Yeah, it would be fine as just a feature set demo, but it's a tad silly to make a comparison with the A6X, when an actual Tegra 5 wouldn't run it either.
Hopefully it isn't seen as more than a feature set demo. It is a bit of a cheap trick but that's really the only way nVidia can show off the performance of Tegra 5's graphics component as games designed to run on the Tegra 5 have not yet been developed.
Come to think of it... are there any serious 3d games being developed for next gen phone chips?