It's surprising how many have interest in console MMOs. It's not planned upon launch, and it's always something they might consider later, which would probably depend on the next gen consoles. PS3 currently is capable of running MMOs (FFXIV), but I have yet to see one on the 360. If there's going to be ESO on console, it's going to be on the 720/ PS4 where they don't have to specifically go back and dull down the entire game graphics wise.
I suppose it depends on how you define "MMO", but Defiance is out for the Xbox 360 right now, in addition to PS3 and PC. I wouldn't expect to see ESO on any consoles, however. Normally if you intend to support controllers the UI is designed around that from the start.