IMO, Chromium OS is designed to run on bare minimum of resources.
So, it will run in any laptops manufactured these days.
But before you try to install Chrome OS, make sure you really want it. You won't be able to run any windows apps, couldn't play games, as well as, may not able to play High def movies etc. (But, Youtube videos would play just fine).
So, my suggestion is first analyze your requirement and then go ahead.