I think metro would be fine if more experiences could exist there. It is almost impossible to use your computer normally and stay within metro. If you use Outlook, Word, Powerpoint ... , if you game .... etc.
There is no Google Talk client that actuall works in metro ... so many things. If the metro experience were all of the sudden all inclusive, I think the compalints would lower.
You can be rest assured that Google will not write any Metro apps. It's all out WAR now.