Oh the plugin woes. Chrome OS is wonderful it truly is however, it has some serious drawbacks. The lack of native plugin support is truly frustrating. Things like QuickTime and Xvid for starters. Then there is Silverlight and random proprietary plugins used on premium websites as well (Xfinity TV streaming is a big blow for me).
Things like native client and other avenues may play out in the future to allow said plugins but for now us Chrome OS users are stuck dealing with websites that simply do not work on our Chromebooks.
I look forward to the day that I can ditch my other computers in my house and run completely in the cloud and completely using Chrome OS. No matter what no one can deny that the Chromebooks are shaping up to be amazing even with said drawbacks.