did a little research on the subject, and 'discovered' the Toshiba Tecra M4. it's being marketed as a business tool, but would work great for artists.
unlink most tablet PC's on the market, this one has a 14" screen (as opposed to 12") and SXGA resolution (forgot the resolution, but it's 190% of 1024 x 768 or something like that). that's a real-world dpi of about 120. that's passable print resolution in my book.
it's also equipped with a Wacom digitizer, and the pressure sensitivity is something like 350? (weird number i know). as far as i know, the cursor does keep up with the stylus tip.
on the hardware side, you can get up to a 2.13 Ghz Pentium M and 2 GB of DDR2 RAM. it also comes with a Geforce Go 6600 and can run Doom3 at about 100 fps.
The cons are:
-it's 6 lbs and gets hot. not ideal for cradling in your arms and sketching. you'd have to set it down somwhere to draw, which isn't entirely bad.
-narrow viewing angle. 30-45 degrees before color loses accuracy. although head on, it is supposed to be gorgeous.
-it isn't ICC profiled like the Cintiq21, although you could calibrate it yourself with much effort.
-the price is $1800 upwards (my setup would cost $2200). you can get a high-powered gaming laptop for that price, or a decent 3D workstation. depends on what you want out of it i guess.
-battery life is 3.5-4 hours. 8-8.75 hours if you get a dual-batt.
I think it's only a matter of time before we start seeing tablet PC's that are actually desirable as mobile art pads! anyone alse looking out for one? can anyone with connections start petitioning for artist tablets?