Makes sense. There is a new Tegra chip (is it Tegra 2?) which should be cheaper to fabricate by now as the fabrication process for the olf Tegra is getting old. The Tegra 2, as far as I know, has either double performance at the same power consumption or same performance at half the energy consumption.
I hope Nintendo goes for the latter and we wont see any titles that are exclusive to the new model.