It seems the iPad is moving companies to HTML5. Others are developing iPad apps to play videos. It will work out pretty well I think.
I think you are right. The iPad will make tablet computers go mainstream. There will be lots of other tablets on the market, but no other vendor with have a tablet as well made as Apple's. The iPad will have lot's of appealing features that are easy to use. And no, I won't be buying one, but I think the iPad will set the standard for others to follow.