I thought it was a decent enough show. Thought they'd announce some partial upgrade for the iMacs at least. It was nice to see the 650M added to the MBP as well. The 555M in my current laptop is a great card. I don't game heavily on my laptop, but for the few I do play, like Skyrim, it handles them brilliantly.
Still a couple of things that bug me about iOS6 though.
Doesn't seem to be any mention of opening up an API for Notification Centre for third party widgets.
I'd also like a simple extension of the restriction feature so that I can passcode lock certain apps. I know developers can do this individually for their own app, but it would be useful for the stock apps and the ones that don't.
And, the new Maps. As a 4 user, I'd rather stick with what I've got now, which works perfectly for me, then end up with a gimped solution with a half feature set because they've decided to throw dildos at each other. Bye bye Street View I guess, which I found incredibly useful from my phone.
But, I'm at least thankful they're unifying caller ID between phone number and Apple ID when using iMessage/FaceTime.