the new iPhone has 250 000 developers! a load of which are game developers such as SEGA!
here are some good examples of games on the iphone
http://www.youtube.com/watch?v=ij5KZ8lA1yk&eurl=http://video.google.com/videosearch?q=wwdc+2008+keynote&sitesearch=
http://www.youtube.com/watch?v=zkkJWhJXf-U&eurl=http://video.google.com/videosearch?q=wwdc+2008+keynote&sitesearch=
http://www.youtube.com/watch?v=KYwDFpAXcgo&eurl=http://video.google.com/videosearch?q=wwdc+2008+keynote&sitesearch=
http://www.youtube.com/watch?v=gS-LW86GI2I&eurl=http://video.google.com/videosearch?q=wwdc+2008+keynote&sitesearch=
the 3d is in my opinion on par with ds. the ease to make them is unparalleled