NVidia's Tegra opens the opportunity to all kind of hardware acceleration in UI and games and such. The NIT currently isn't aimed at 3D games, nor does it contain much (functional) eye-candy, so in order to switch it'd constitute a big change in maemo. Given the design of the Pandora (potentially, a mini portable game computer) it'd be more in the interest for such device, than the NIT. The NIT, as it is, serves different goals than a primary goal of gaming. Switching to a totally different platform is not child's play, BTW. IMO Tegra is definetely something to keep an eye on.