Guess what? I'm actually on of the FEW people here that have seen the m2010 in action as my idiot jackass boss's wife works for Dell and he had it at work yesterday (isn't 60 too old to brag? Seriously!). I would NOT go with the m2010 for the time being for the following reasons:
1. That thing is big. I mean BIG. If you thought a 17" laptop was somewhat of a chore, just look at this monster.
2. Weights a ton. I'm not exactly sure how much, but it felt like it was 2-3 times heavier than my e1705.
4. Awkwardly klunky. This right there surprised me as I expected it to just be simply a larger laptop...but when actually using it as a laptop on a desk, the elevated screen makes the viewing angle seem a little strange unless your desk/chair height is perfect....we had to actually angle the screen downwards, and that was annoying...and the keyboard, while nice to have one that big, is a pain in the ass to use while attatched...which means no you have a space issue in your work area.
5. ATI Mobitlity X1800...while it's a nice card i'm sure (didn't try any games, cuz he doesn't play them), you can't help but feel shafted that the chose that card over the 7900GS or 7900GTX....especially with the GS being available on the "lower" high-end laptops (1705).
6. Screen isn't that great...but maybe b/c I actually prefer the somewhat "Glossier" WUXGA @ higher resolutionss.....it works, but it's a little weird on a monitor that big, when desktop LCDs of the same size offer more.
7. No where near as portable as you thing...the PSU is HUGE...talking old-school laptops here. I don't know if it's 130w like the rest of the laptops, but it's definately a lot bigger...and just to actually lug that bad boy around from place to place is just too much of a pain.
8. Price. Nuff said.
Bottom line, it's really ultra "cool," but from a consumer's standpoint, it doesn't offer anything really new (other than design), is limited in performance, and can be considered to have "weaker" graphics by the inclusion of the x1800 (albeit, a NICE card anyways)...and the price seems HORRIBLY bloated, but that can be forgiven as it's the hottest new thing out there.
I might pick one up in the future if they start offering either more in terms of performance/graphics, or a price drop. $4,300 nicely-equipped just isn't justified, IMO, when compared to the m1710.