I don't believe current gen consoles have the muscle to pull of a new TES game.... Perhaps the playstation 3 maybe... TES games are always built at the cutting edge of technology, i doubt bethesda would want to break their stride with this. Oblivion on 360 has a less than ideal framerate much of the time, thats a concern. Because these consoles are no way near the end of their life span. I cant imagine beth wanting to release without supporting all platforms. Im a pc gamer, but realize the importance of cross platform support.
This means, a possible long wait for this beloved series to produce another sequel.... (sniff...tears)
I see you haven't read the quote of Todd Howard after Fallout 3 came out , he stated plainly that he wants to release at least one more game on current consoles and waiting to the next console line would be idiotic. To be brutally honest I think your prediction is totally wrong because I believe what Todd says ......most of the time.