You can run any software you like on Android, if it's open source. You just compile it yourself, and sign it with the limited distribution signature the blog post mentions. Hell, I've never done it, but re-signing any APK with your own signature sounds like it should be feasible. If it is, you can run any APK you want on your own hardware.

Get a grip. Yes it might be possible the world is out to get you. But it's also possible Google is trying to do exactly what they say on the tin - make the world a safer place for people who don't know shit from clay. In this particular case, if they are trying to restrict what an person with a modicum of skillz can do on their own phone it's a piss poor effort, so I'm inclined to think it's the latter. They aren't even removing the adb app upload hole.