I'd like to see Samsung in the gaming market. They used to create cheap affordable electronics but in the past 10 or so years have gone to one of the better manufacturers. I've dealt with their C.S. and they're very good so the company has a decent customer relationship, their items are typically easy enough to use so they can create a interface that doesn't scare people away. They've also got a nack in creating items that are ergonomic and pleasing on the eyes.
That failing I'd have to put LG or Panasonic in there though it seems far less likely to me. Apple, I don't think it'd work. As stated Apples policies are pretty strict on their products, notice how 90% of PC games don't even play on Apple computers? As far as innovative they'd have to fight with Nintendo and the two are constantly compared. One of them would snuff out the other and Nintendos already garnering the "Casual" support that Apple would seek out.
Truth be told though, 3 consoles is pleanty, in fact I'd put money someones going to sink into near obscurity this generation for at least this and the following generation possibly 2.
