@joenunya: It's cool, there were days when the graphics card would affect colour. I remember when Matrox was the bees knees for 2D graphics. As to true colour reproduction I'm guessing your after it for something like photography? I know these tablets have become popular aids for the pros and amateurs alike.
As to Nvidia's SoC, I find it hard to believe they'd get much (if any) overall power improvements on the same fab process with a larger chip unless there are some real deficiencies in Tegra 2's power management, or those GPU cores are just a heck of a lot better... but then
this report (rumour) does support a same or less than Tegra 2 view.