The web has become decreasingly flash dependent. A few years ago this was very noticeable on iPhones. Now I don't come across very many sites that don't work. I think (and this is just speculation) that the industry is really moving away from flash when HTML 5 or whatever it's called is usable anywhere.
With the iPad being so hot right now, websites don't want to miss out on that clientele.
So, while you'll still come across a few, it's really much less noticeable these days. If you have an occasional site you'll have to get off your lazy butt and walk over to your desktop.