I think it's more likely they'll add ever more developer hurdles and effectively ghettoize unsigned apps than ever just flip a switch and announce "App Store on

I think it's more likely they'll add ever more developer hurdles and effectively ghettoize unsigned apps than ever just flip a switch and announce "App Store only!" Unless they change gears and hype up OS XI as a game-changing iOS/OS X merger. They've certainly taken some steps that are perfect to tease out slippery slope paranoia. It would be a bit scary if there weren't easily accessible alternative OSes.