I happened to be in Target today and saw they had the Infinity setup all ready to go for launch day. TRU didn't have one (if they did, I didn't see it?) and Walmart also had no display. Curiously, TRU actually had huge "Disney Infinity Coming Soon" banners on the front of the building!
The main display has plenty of room for figures, and it looks like they may have simply done away with a bit of space from the PS3/360 games.
The actual portal area was on the end, and featured a neon white border around the sign. It's definitely got a brighter, lighter, and flashier design than the Skylanders display; probably on purpose.
I don't intend to get the game, but heck if it isn't attractive.