I still don't get what the advantage is, even with Windows ? Today, you have WinMo on which you already use a standard RAD IDE (VisualStudio et al) and it supports multiple architectures. X86 compatibility will not solve any of the UI problems Windows apps face when running on small/touchscreens, and stock win X86 libs/GUIs are not written with mobile (power constrained) use in mind, so, what exactly is the gain ?