So I thought for one I thought it would be cool if you had a console that excepted multiple discs, or a cartridge with several discs inside. This would serve so that you can release the game in parts, or use the same models and/or gameplay and/or engine for multiple games without using up space on the disc so that you can have bigger games.
Next it would cool if said console could connect to and utilize multiple televisions at the same time. Not many people are going to buy more than one console for their house, but this would help sell multiplayer games by getting rid of split screen. This could also be used to provide a bigger area of view in some games than with just one television, making it easier to do things.
Next would have to be more than four players at once. The multiple television thing would help with this. Basically, you have games where more than one television is required for more than a set amount of players, and then you have some where everyone is on screen at once. This would cause bigger gatherings, and it would also mean less money needed on servers.
Advanced graphic and control capabilities. For instance, multiple controllers that do different things for different games or to be used in tangent. You could have gloves, a classic controller of sorts, a helmet, voice recognition stuff, and various other things. Also you would take advantage of a person's natural behaviour, instead of making them learn to play, design it to work on people's instincts and therefore be easier to play.
Room for expansion, so that you don't need to get a new computer every time, just the expansion that allows the better graphics, or the better gameplay. This way the console would be able to last for around ten years instead of just five, and then we could come out with expansions every two years so that it can continue to compete and would not be replaced until we reach the end of what expansions alone can do. Then we redesign it with new expansion capabilities, and add in all the current expansions directly to the console. But even with expansions we continue to make games that don't require them. And because it isn't actually a major change all of the major 'revisions' that require buying an entirely new console would be compatible to play the older games. Plus you would have some sort of exchange where you get a discount on the new one for bringing in your old one and the expansions for it. It would essentially be a mini computer dedicated to playing games and that sort of thing, upgradable, but not indefinitely.
That is all I can think of for now, what do you think would be nice to have?