To anyone who says that it has useless features, it really depends on your needs. If you're a gamer, you'd probably want Lion since it has OpenGL 3.2, which is a major upgrade over Snow Leopards offerings. If you're someone who is fine with the current offering in SL, then you could probably let this one go by. You should also note that since iOS 5 and Lion are being mentioned at the same time in WWDC, you should expect some sort of connection between the two, most likely through iCloud. In that case, new features would be added to Lion. I have used the Developer Preview of Lion and I can say that it is not yet ready for the consumer market. While it is much stabler than DP1, Safari and other applications still have various problems with them, some very serious. On top of that, if Apple announces new features at WWDC, then they'll need another DP, probably a GM release, that has all of the new features before actually releasing it to the public to iron out bugs. Don't expect any release of Lion at least until late July or maybe early August.