Regardless of who's working on the ride system, it'll be lame to be able to see the other riders in the other cars as the ride is happening. Personally, if it was up to me, I'd make all the ride vehicles similar to the Simpson's vehicles/8 passenger DeLoreans, since the height of the doors blocks out the view of the other riders (for the most part). That would've been a great solution.
As for future projector upgrades, it'll be nice to see an improved system for Simpson's. The footage is so dark and...blehh. I'm also curious if they'll eventually upgrade King Kong 360 3D, which uses 2K HD and polarizing glasses, to instead use Dolby 3D like Transformers, Minion Mayhem, Spiderman and Star Tours. Would be fantastic to see Kong a bit brighter and sharper. But might be unrealistic since the Dolby glasses are so expensive and stocking them for the tour and not having the bored tour guests drop them off or break them after Kong would be difficult.
(Although that would be solved if the future F&F animation uses Dolby 3D at the END of the tour, forcing the tour guests to hold on the glasses for the entire tour)