MSFT's biggest headache is rumors like this. Word of mouth is a powerful thing. Android took off largely because a lot of people started saying good things about it. Lately every perceived ill of computing, including things MSFT has little to nothing to do with, have been blamed on MSFT.
I don't like the XBOne, but I can tell you the perception of the system, partly due to MSFT's own missteps, has limited the sales. You wouldn't even realize that despite lagging behind Sony, the sales have been much faster than the 360 during its launch.But that is also a consequence of the culture we've fomented. If it's not the latest and greatest, if it isn't stomping its opponents into the ground, it's almost immediately deemed a failure. There is no patience for anything new that has to struggle to evolve into something better. No one wants to make improvements to things that aren't working, if it starts lagging at all they want to scrap it altogether.I doubt that MSFT will let Android apps onto their WP8 devices.
Even now MSFT is not a hardware company. Just because they own Nokia for now and Xbox, doesn't make them a hardware company. These two are mainly platforms for generating revenue and distributing software. Allowing Android apps onto the platform would essentially render WP8 nothing but Android under a different name.