All of you guys are just making assumptions and going off of rumors that some blogger has pulled out of their ass, lol. I personally feel it will be upgradable, especially considering Microsoft's history with being able to install an OS on significantly older hardware. Yes, we might be missing features, but, hello, the same thing happened on Mango. Afaik I don't have a gyroscope, so guess what, my phone doesn't utilize it. And that's my assumption on what's going to happen with Apollo. All devices will get it, it'll just have the tango-effect in the marketplace and with features.