Despite the fad of plastic instruments coming to a quiet end a few years ago, Rock Band is still a fairly popular brand, popular at parties and on the upcoming downloadable console version called Rock Band Blitz. But at least one part of Rock Band's legacy is going away for good: EA has announced that the iOS versions of the game will be off of the App Store as of July 31. Harmonix was the original creator of Rock Band, EA licensed the game and the name to put versions on the App Store (made by third-party developers), and as a result of that license expiring, Rock Band for iPhone and iPad are going bye-bye.
All this means is that if you currently own one of these versions, you'll need to get it on your iPhone or Mac and back it up, because after July 31, you won't be able to reinstall it. If you haven't bought it yet, and want to, now's probably the time to do that. After the 31st, you won't be able to buy the app or any more new songs for it.
Or maybe not -- Harmonix is currently at work on that Rock Band Blitz game, so there's a chance that, license back in hand, the company could release their own Rock Band game for iOS. Harmonix has released one app before (a non-game app called Vidrhythm), and while the company hasn't shown a lot of interest in Apple's platform beyond that, there's a chance the developer could take to the store itself if they thought the move would be profitable.