Nah, I much prefer Windows. At least with Windows, you can build .NET applications with MS Visual Studio. And you can also use it permanently offline, the computer will never see the internet so updates will never be forced onto you, nor will MS be able to spy on you. Knowing Google, their OS will absolutely not function without internet connection. And I don't think it will be a trivial task to do casual programming or coding on it.
Googles answer to MacOS & iOS
Can't even imagine what they'll cost. The recent S tablet lineup is horrendously expensive.