I was going to reply to another topic, but realized there were several that were essentially the same, so I figured I'd give my perspective as a new post.
Disclaimer: I am not an avid board game player. I have played a few popular games on and off, mostly with family, throughout the course of my life. We're particularly fond of Risk. But I can't draw any comparisons with VHS board games and the like because I've never played any such games.
Still, I'd like to share some of my more optimistic thoughts on the app with this board game. I noticed several people were concerned with the longevity of the game due to evolving technologies and reliance on company support. 20 years ago, that would have been a very valid concern. However, the possibilities with software are endless, and people are always finding new and simpler ways to get things done. There are many people interested in preserving all kinds of old forms of entertainment. There are many classic game remakes, for example. There are huge modding communities. Cross-platform technologies are becoming much more common and robust. I regularly play OTTD, a free-software remake of a classic game, on my Linux desktop with a friend overseas on his Windows PC using VPN. There is a project to remake Morrowind's engine as free software. There are tools and libraries for porting applications between iOS and Android. There are really easy-to-use programming languages which even new programmers can be quite productive with. I use special software to run Silverlight in my browser on Linux so I can watch Netflix. And who hasn't used Craigslist recently? Simply put, this game using an app is far from a death sentence. As long as there is even a little bit of interest, either the app will exist or someone will make their own software to replace or preserve it. I'm far more wary of proprietary dice, stackable board tiles, or just about any cards other than standard playing card decks. And people have found ways to work around all of those things in the past. An app is easier to replace, modify, and distribute in today's world. Now sure, if there was some huge server infrastructure to support online play, I'd understand the concerns, as many good online games have lost support for this reason... but it's just a simple standalone app from what I can tell.
Also, to go more along the expansion route, if FFG doesn't do it, I could see community modders coming up with new alien strategies or game rules in a custom app to provide more ways of playing over time, even without the support of FFG. Of course, IP is a big factor, but even if the community ignored the XCOM lore and just came up with new alternatives, it could make the game more interesting and dynamic.
As for people just wanting to get away from electronics, I agree it's a fair point, but at the same time, you're now coming in with more specialized requirements and constraints, and I think when doing that, it's best to be humble and recognize the entire market can't revolve around your constraints. So you need to compare your options and see what works best for you. There's no reason you can't have the XCOM board game, but then also a non-electronic game for when you don't feel like using electronics, or when the power goes out, or for a vacation cabin in the woods without power, or whatever your scenario may be. It's like complaining that a Hummer should have good gas mileage because you like the vehicle but live far away from the nearest gas station and don't want to get lost. It's kind of hard to have a real-time, fully cooperative game against an adversary at least more complex than a pair of dice without using an app. There's almost no way around it, and any way involving drawing cards, rolling dice, etc., takes away from the intense real-time feel, and is therefore inherently a compromise.
I haven't played or seen the game yet, only read a couple of demo reviews, but this is the first board game I've ever been explicitly excited for in my life, and I'm just confused by all the pessimism around the app. Realistically, I'm guessing the same people who won't buy the game because it requires an app which might not be available in a few years or during a power outage, will have power 99% of the time they play, and will have access to some form of the app for many years to come. VHS board games probably didn't work because they tried blending inherently uninteractive recordings with interactive gameplay. Also, the VHS technology is not as easily or cheaply portable as today's digital applications. To compare XCOM to those games is like saying you'll never fly on an airplane because the Wright brothers' first flight only lasted a short while and wouldn't get you to your destination. It denies all the advantages which have been developed over decades of technological evolution.
Well, sorry if this sounded like a rant, it's my first post, but I just felt like giving a different, more optimistic perspective, since I'd hate to see this game sell poorly due to a misunderstanding about the longevity of applications versus that of the other components of a board game.