It uses newer IPS technology (H-IPS) that is better than the older IPS technology. And why is 16:9 bad? It's better for gaming (wider FOV) and videos (most videos are 16:9 or wider). The only benefit of a 30" is 160 extra vertical pixels, but with 1440 vertical pixels, having 160 fewer pixels won't make much of a difference.
Not this again. 16:10 2560x1600 can do everything the 16:9 does when using 16:9 resolutions, just with tiny black bars. Most of the time people use desktop apps and extra vertical resolution is good to have there. Not to mention the physically larger size of the 30" vs 27".
IMO the whole input lag thing is pretty overrated. I can't notice any perceivable difference between my 3008WFP A02 revision and my 40" Sony HDTV that is supposed to have only 0-10 ms lag according to hdtvtest.co.uk. I'm sure there is one if you use test programs and cameras but if I can't spot it when actually using it, it is irrelevant to me.
The biggest drawbacks of the 3008WFP (and the U2711) are the really slow resolution/input switching. It takes roughly 5 seconds to change resolutions or inputs for some reason. Very annoying if you are flipping thru the inputs. Not being able to disable inputs is another problem, having to cycle thru all those analog inputs is a chore. The menus are also very poorly designed on the 3008WFP (apparently better on the U2711). Having USB connected can make your computer come out of sleep if you switch the monitor completely off, probably due to the card reader becoming "disconnected". Most of the color presets are also just plain awful.
The upcoming U3011 seems to have a better set of inputs (less mostly useless ones) but I really hope that they've worked on the afore-mentioned issues too.
As far as 30" panels go, there haven't been any real improvements. You'll notice a bigger difference in the various antiglare coatings than between panels.
The lack of a OSD in most displays will make for more difficult color calibration and possibly fucked up colors in games (since they don't support color profiles). I used to have a 20" Viewsonic that would be very blueish if you didn't use software calibration in combination with the hardware RGB settings (the hardware settings weren't enough for good colors, especially grays) and it was just awful when gaming because the software calibration part got turned off. So at least for me a proper OSD with color control settings is a must.
For Windows users the scaler shouldn't be that important since the graphics card can scale the lower resolutions.