Buying Lion is a complete waste of $30. There is nothing new. Plus Rosetta is not in there so that means 2 apps I use all the time would be worthless. But even if it did have Rosetta, still not worth it.
Mission Control is nothing more than a re-named Expose that adds switching to different Spaces. Not impressed.
Multi-touch gestures are already present in Snow Leopard. I can already go back and forward in Safari using gestures now...they just added a little effect of seeing the old page scroll off to the right or left of the screen. whoopi.... Now Safari doesn't have a scroll bar. WOW!!! Innovation (sarcasm)
I use gestures right now for everything. To bring up Dashboard, Expose, Spaces, Navigating in windows (safari, finder)..... again nothing new.
I could go on and on.
I think Apple is running out of ideas of innovation in an operating system and are just re-naming things after making them look a little different. Kind of disappointing. But then yet, what else can one really do to an OS....
Apple won't be getting any money from me. I'll stick with my Snow Leopard thank you very much until I see something really new.
One thing they could do is make the OS have an artificial AI that you interact with. Now that would be cool! Tell the Mac to open up Text Edit and have it type what you say like a secretary would, or tell it to Google something and it instantly opens up Safari and does the search for you. Ask it what the weather's like and it opens up The Weather Channel in Safari and tells you the current conditions + forecast (using voice) while you look at it.
Ones imagination is the limit with this. The OS would even have it's own voice that responds to you. Now that's innovation....
i guess we watched different feeds of the keynote address. in mine, apple radically re-engineered everything to finally make it so that computers are beginning to realize their potential as things of beauty, elegance, art, and productivity. computers have often seemed like glorified calculators and word processors to me over the years, but this is the culmination of a trend to make them something more, and this is the first operating system i am actually excited about.
the stuff that you seem to want is not ai, but voice recognition. it exists. install dragon naturally speaking or some other app like that if you want to chat up your computer. i don't really want to be hanging out in an office or coffee shop with a bunch of people yelling at their computers, but if that is your idea of a better operating system, then you can have it right now
personally, in terms of getting things done (gtd), i can type a lot faster than i speak. the integration of everything (ios 5, lion, icloud, the trackpad, etc.) is going to change everything. again.
EDIT: Oh, and it is only 30 dollars. Incredible.