I think folks need to remember that FFG are going for a totally different corner of the market here.
I'm a wargamer at heart, having grown up with GW games like Warhammer 40K, Necromunda and Mordheim. When I got into these games in my youth, I picked up the WEG Star Wars Miniature Battles rulebooks for the sole purpose of playing a game like 40K in a Star Wars setting.
IA will continue, as that appeals, again, to a different gamer, with it's board game esque focus. And that's OK.
For me, nothing beats the feeling of seeing a fully painted army of miniatures on display or in a display cabinet. Star Wars Legion looks like it will be replacing 40K as my miniature game hobby of choice.
I, for one, am super excited by this prospect!