It seems to me that it shouldn't be all that hard for Ubuntu to 'hijack' Android apps in their phone effort. The advantage to Ubuntu is that it comes into the game with a huge app library ready to use. The disadvantage is that except for those actually in the tech industry, nobody's even heard of Ubuntu or Linux as such.

If Ubuntu mobile can demonstrate itself as more stable and easier to use than Android, it could take a huge bite out of Android's market and really bring Ubuntu to the forefront as a desktop OS as well. If they're well integrated, Linux may finally make it as a third desktop option.