100 Reasons You'll Be Speechless - Microsoft

I wouldn't exactly call "Vista" features are speechless. There are great improvements and lot's of business and home features.

Check the list of "Speechless" reasons from Microsoft:

http://www.microsoft.com/windows/products/windowsvista/100reasons.mspx?wt_svl=10288VHa1&mg_id=10288VHb1