If they do come out with a bigger screen version (which I REALLY WANT!), as long as it's the same aspect ratio then it's very easy for developers to natively support it. If it's the same aspect ratio AND same resolution, then there's nothing they need to do at all if they already support iPhone 5.
BTW guys, Alien Space and Alien Space Retro are both being updated for iPhone 5! In fact, both updates have already been submitted for App Store approval and are now just waiting for Apple to review them.
HOLY CRAP!!! I didn't think this game was ever going to be updated ever again!!! iDaTank just got widescreen support!!! I'm so stoked!! This is one of my favorite iOS games ever. Can't wait to get into it again on the small screen. =oD
Still no fighting games with widescreen. Pretty frickin lame considering the size of the devs EDIT: Except of coarse SFxTekken which is pretty sucky
Oddly enough I'd guess that it's more likely that small devs will update games to iPhone 5 than larger ones. A small dev can usually take a week or two and do something without middle-managers approving it. But, for a larger dev studio, everything has to be planned and approved with plenty of lead time, and it really depends on whether there's a financial benefit to doing that thing.
WOOHOO!!! Reckless Getaway I've been waiting and waiting for this one to hit... can't wait to get back into it! =oD
Mortal Skies Mortal Skies 2 Pyracubes Honey Tribe Cytus (this was updated a while ago, but I haven't seen it listed here) Space Leap Ninja Ponk (this one was also updated a while ago, but I haven't seen it listed) Raging Pigs
World to Conquer, a SRPG, is now 5G widescreen compatible. Also new release Kingturn Plus, another SRPG.
PewPew 2 is the one, today. (also, new game mode) https://itunes.apple.com/app/id370379981?mt=8&affId=2048933