Building a completely new mobile OS is a very ambitious project unless you're going to go the route of Firefox OS, which could somewhat work, but instead forking AOSP and applying this UI seems more realistic, and I'd totally use that
Discussion
Indeed it is, i’m just building iOS-like controls for my cross-platform app. It’s basically an immediate mode UIKit. Then i was like… what do i need iOS for exactly? what they provide is not that hard to build, at least the ui bits.