As an instant on OS to complement Windows 7. However, ChromeOS isn't made for touch, and its already been tried on the Archos, engadget had an article a few months back. Unfortunately, the guy had to keep his keyboard and mouse plugged in.
I'd be more interested in dual booting Maemo. which is available and does support touch, Viliv people have gotten past the Intel GMA 500 video driver issue I believe, so it may actually work now.
Good answer. I think though that Chrome OS wold work on must computers now that it's becoming available to the general public. Betas (and even new final versions) will have their issues.