I just got back from Essen Games Fair and at the booth of Feder & Schwert (the company who will be responsible for the German translation) I happened to watch a group of newbies playing WFRPv3. While they played, I skimmed through the books, looked at the cards and the careers and tried to figure out what the difference, in actual gaming, to v2 is. IMHO, if the GM is the same, the game is the same - it just uses a lot of gimmicks to support the GM (and yes, to make it look better...). I love the new dice (instead of "make a Challenging Whatever-Test you now grab an additional dice or two), I admired the career sheets and I loved the cards and all the other gimmicks. It was my impression that they aid the game; help it flowing and support the GM.
Basically, it was my impression that the system tries to be a pen-less pen & paper RPG. You have lots of counters and markers and two-sided cards that can easily be used to show a different status; you do not need to write and erase on your character sheet. If you (as an experienced GM I would assume) look at a player's "character-area" you should be able to check out his status easily, without asking and interrupting the game flow.
Of course, you'll probably need a larger table...
And off-topic: I also picked up a copy of Rogue Trader (oh man, that also looks cool!) and was able to get a set of the three basic 4.0 D&D books very cheaply. There are so many references to this game in these forums, I thought I should take a closer look at them