As a current Penryn MBP owner, my complaints for the new MBPs are:
1) No Matte option. Not as bad as some whiners make it sound like on macrumors forums. Get a glare protector.
2) The new look is ok, more iPhone looking, but not revolutionary to me. It's not dead sexy from the slides they show but it looks dead sexy on the Apple site (of course those are marketing pics that make it look awesome).
3) Battery life is down. 4 hours on 9600 vs 5 hrs on 8600. Battery went from 60whr to 50whr, and while Montevina will save some power, it's clearly a loss in battery life. Telling me that I can now use the 9400 doesn't say much. If anything, we should expect battery life to increase when you compare apples to apples like using a 9600 vs the old 8600 full time. But I guess shrinking things required shrinking the battery. No one's really complained but I'm sure real world tests won't be too generous if you need the 9600. MBPs only do so well in power because they use speed step AGGRESSIVELY compared to PCs. You expect your 60whr Thinkpad battery to do that well? Hell no. I'd rather have a better battery than to use tricks up the sleeve to make the laptop look like it lasts long.
4) Pricing. Education pricing is ghetto now. $1899 for a MBP? No $200 discount anymore? Apple, your stuff is expensive enough. They're great products, but pricing is horrendous. I remember customizing a Dell XPS1530 the week after I got my MBP. It was like 1200 or something for specs at or above the level of my MBP. Who cares. Stupid impulsive buyers like me will still fall for them.
Overall it's what I expected, not a major overhaul. More of an internal design overhaul that might make assembly for them easier and streamlined manufacturing. As a manufacturing engineer, I suppose more of the change was an internal thing, making it easier to upgrade through the years especially when Nehalem requires an architecture overhaul.
People expected quad cores, huge speed increases, BD, blah blah but like I said it doesn't make marketing sense for something totally new in 6 months especially when Nehalem is the bigger change in the future. This sets things in stone so they CAN put in BD one day or upgrade the resolution, blah blah blah while retaining the same manufacturing and design layout.