He didn't ban the Galaxy S3. Nor the iPhone 4S. Nor the new iPad. Nor the latest Samsung tablets. It's a "win" for Samsung because they'll earn a slightly bigger reward, but that's it.
AFAIK, you can't download and install it on your phone. A given carrier / manufacturer must talk to them, then they'll tailor the OS to a model, and then the users who buy that specific model can get Ubuntu. This is not a product for the end users, but a way for manufacturers to add value to their handsets.
They had the dominant smartphone OS AND the dominant dumbphone OS. They had an experimental high end, Linux-based OS that was almost ready to retake the top spot in mindshare. They had the best development tools, which would allow one to target those 3 OSs simultaneously. And they were developing this new Linux-based dumbphone OS that would be created around those tools.
Now they have Windows Phone.
Lots of folks confuse bad management with destiny. -- Frank Hubbard