Same here. I've just bought a new Windows laptop, and I'm planning on getting a new "machine" around 2015 or so. The hardware should be "good enough" by then (quad core 2.5-3.0 Ghz Cortex A20 - or whatever they are calling the next-gen 64 bit chip after A15), and I'm hoping Android will be mature enough as an OS by then with a lot of productivity apps, that I can just use an Android machine (like a Transformer device) for everything.
I'm also on the lookout for a Windows alternative in the future, as I'm not liking the direction Microsoft is taking with Metro at all. But Google needs to become a lot more serious about tablet (and desktop) apps by then. So far I've not seen that, but maybe things will change when they launch their own Android tablet at I/O, unless they will keep pretending phone apps are good enough for larger screens.
I'm also on the lookout for a Windows alternative in the future, as I'm not liking the direction Microsoft is taking with Metro at all. But Google needs to become a lot more serious about tablet (and desktop) apps by then. So far I've not seen that, but maybe things will change when they launch their own Android tablet at I/O, unless they will keep pretending phone apps are good enough for larger screens.