I think what I was trying to get at was how those emulation layers will be implemented. i.e. will they be transparent to the user. I used the PalmOS emulator example on purpose. The POS emulator literally turns your device into a Palm and it brings up a windowed virtual palm pilot and you can run apps within that Palm "Window"
An alternate way of doing this is making the adaption layer invisible to the user. All they see is a regular app icon and they click and it opens in it's own window. i.e. the user would never know it's an Android app.
Option #1 is acceptable, but not ideal