1) Flash is not going to be proprietary for long, Adobe is going to open the spec, just like they did for PDF.
2) Give me an IDE that came make a game as good as a flash game that can run in any browser and is "open"
3) GAMES ARE IN FLASH. MANY COMPANIES DEPEND ON THESE GAMES TO SURVIVE. I though that CS5 would allow cross-compiling into iPhone, which would be pretty good. But Apple shut that down also! WTF!
4) H.264 IS NOT OPEN. Its freaking proprietary. Don't drink the kool-aid! Ogg Vorbis is not going to be used because it is NOT patented. Its so f'ed up. Thats why people use flash, its a plugin so it avoids these problems!
5) Apple fanboys are such hypocrites. First they say Flash sucks because all it is used for is banner ads, blah blah blah. But now the iPhone has iAds and no flash. And everyone is SOOO happy....