I ordered a Chromecast. It's hard to say no when the cost after factoring in the three free months of Netflix is in fast food value meal territory.
I would definitely prefer something that fulfilled the original promises of Google TV (a unified interface for conventional set-top-boxes and online streaming stuff) but there's just too much diversity in STBs, and no incentive for the TV providers to play ball with anyone else.
I'm not sure how I feel about the lack of a built-in user interface. Browsing and searching using an IR remote is never fun, but sometimes you don't want to have to reach for your phone/tablet and fire up / switch to the app just to hit play/pause.