Yes, eventually sites will switch to HTML 5.0 which allows videos to be imbedded without flash but that move is "awhile" away. Currently I think only Safari and Chrome support it. And Chrome is still in beta form on the Macs.
In a way this is kind of good for me as I promised my wife that my 27 inch Imac would be my computer buy this year. As the Ipad currently stands I don't want one.
Hopefully the next version will have a web cam (then it becomes a great skyping machine) and by then the flash / HTML 5 thing will be more settled. Then I will want an Ipad to replace my macbook.