I'm interested in what they come out with tomorrow as well. What I don't understand is why they haven't released more information prior to.
Intel has already released Sandy Bridge, and is looking to be a very formidable opponent. AMD's silence could mean 1 of 2 things -- 1) They are waiting for the best moment to release the news of it's ability to compete/beat Sandy. Or, 2) It falls behind Sandy on benches, and they must market the chip again for budget builds, or task specific such as rendering, etc.
Especially after Intel's recent issues AMD would have done well to capitalize on it by releasing more information (perhaps, like tomorrow) on it's actual capabilities/benches. This would allow those waiting for the 1155 boards re-release to opt to wait for Bulldozer instead, but that would only be viable if the chip was in fact better than Sandy. Overall, their silence isn't encouraging.
I can only imagine AMD devs comparing their benches to Sandy, and get a sinking feeling when it doesn't compete. They then must move forward with marketing, and appeal to certain sectors of the market. If performance numbers aren't really talked about tomorrow, or that it's focus is going to be towards those who need 8+ cores will be a poor indicator of what to expect in performance for general/gaming use.
However, if Bulldozer does prove to be equal to or better than Sandy -- Intel will be forced to compete even more. Especially if AMD sell their chips cheaper than Intel. If it beat Intel on every bench, and was cheaper -- Intel would have their billion dollar(s) hit, and add to that the losing revenue to a superior/cheaper chip. It'd be Intel who would be playing catch up.