The Asus Transformer Prime might be disqualified because it's not chromeos and it doesn't have a built in hardware keyboard, but it's a quad-core tegra tablet running gingerbread and soon ICS (keyboard optional).

http://www.engadget.com/2011/11/09/transformer-prime-detaile...

I don't have a chromebook but I'm not sure what chromeos offers that android doesn't.