Not particularly impressive surely:
The ARM version is over 1mm thicker and almost 100g heavier than something like the Transformer prime, and iirc the Tegra3+ is supposed to be simply a die-shrink, so still a poor performing SoC considering what it's competition will be, assuming either Exynos or S4 based tablets.
The x86 version is simply too heavy to be a decent portable device (hell my Touchpad is the wrong side of the line in that respect, and that's ~160g lighter), and I'd imagine battery life will be measured in nanoseconds
Maybe I'm missing something but considering it will be going up against the iPad 3 (which beats the ARM version in every respect) and presumably by then the next wave of Android tablets (eg the high res transformer prime, possible Exynos/S4, and Jelly Bean of course), with the iPad 4 coming out not long after, what's the selling point other than it being Windows, which might work for the pointless x86 version but the ARM one only runs metro apps of which there are going to be about 3...