Obviously there are
multiple consoles competing at any given time (and now multiple iterations of the same console), but the appeal of tens of millions of customers with more or less identical hardware is impossible to overstate.
Not exact matches
Kingdoms of Amalur: Reckoning needs to be up there with a lot of
competing RPG games available on
multiple consoles.
Decades ago, Nintendo and SEGA were bitter rivals,
competing with each other in the video game hardware business with their various
consoles and
multiple mascots.