Actually the only company that could (If it released a worthy console tomorrow) rip sales away from Nintendo is Apple.
Apple has the strongest consumer electronics brand in the world, they are also viewed positively by a lot of people.
They have Media synergies they can easily make with their Ipods and they have a huge online music/movie market with Itunes.
They could make their controls even better that Nintendos current Wiimote with the benifit of hindsight.
Their brand is seen as premium so they can extract a premium price for their console and it will still sell.
There are other companies such as EA which would be itching to partner with Apple on a console and share in the profits.
Tease.







