I had one of those thoughts few weeks ago when I was checking whats around those HTML5/CSS3 web sites. I feel really tempted to go and make my next project based on those two technologies but…. Unfortunately its still a dream as I will have to fight with buncha angry calls from my clients that “a lot of our users can’t see this page” and by a lot they would probably meant all those lazy people that are still using IE6 (there are still 50% of IE total mass of users that use this 9 years ofd browser….WHAT???? ) or FF2 or even some other more exotic old-fashioned browsers from the last century.
But anyway, its good to think about all those nice web sites that are around the corner and that we will be designing in near future. While we are waiting on this to become reality and HTML5/CSS3 to become standard you can check some nice examples of what can be done here ( http://html5gallery.com/ )