Not having flash at this point doesn't really bother me that much. I think a hands-on with it will tell me more and if I really need it for the daily browsing and work that I do on the web currently.
If you want to find out the amount of Flash involved in the web I recommend that you install
Firefox and the
Flashblock addon. You may be surprised how much Flash is used for things like buttons & etc to navigate web sites.
For me, the lack of Flash is a deal breaker. There are a lot of other shortcomings, but the lack of Flash is a continuing failure of Apple. Steve promised "all the internet" for the first iPhone. Without Flash you can not access "all the internet". Steve lied.