I've been doing some thinking about 2.0 and the more I think about it, the more questions come up in my mind.
Why haven't we seen more 2.0 sites? Where is Google 2.0, Yahoo 2.0, Amazon 2.0, etc? There is such a vast amount of concepts that are "1.0" that could be done RIA style. Think about it - webmail, portals (though there have been some good ones coming out recently - for example, check out Netvibes), Blogs, search engines, etc, etc, etc...
Which leads me to my next question - Will developers and companies overdo 2.0? Do we NEED Rich blogs, search engines, and whatnot? Does every page have to use Ajax or Flash Remoting style data retrieval. Don't get me wrong, I'm a Huge Fan of not reloading the page, but at what point does it become overkill?
Question 3 - Are users ready for full fledged RIA web app's? Granted, some probably are, but what about those who aren't? Will developers adopt a 1.0/2.0 toggle button on their sites? Some folks are still rolling along at 28.8 dial up. Even if they were ready, there connections most likely aren't!
Question D - What's next? What will 3.0 be about? I'm no prophet, but I see a deeper convergence of PC/TV. The lines will become even further blurred between the TV and the Desktop. I think it's inevitable - as bandwidth gets higher, fiber gets pushed deeper into the neighborhoods and content providers become even hungrier for our hard earned dollars.