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Ahh, but now you're grouping desktops and consoles together, while confronting them previously - a bit of a moving target
Tablets and consoles might as well blend a bit, possibly - maybe Wii U, however ridiculous it seems at first sight (also to me; but then, Wii also seemed that way), is a first swan of what might be in 10 years... (and I didn't say the desktop computers won't be around; they ought to lose mind-share, though)
Mouse is also quite limited, it's geared to one specific type of interaction; it works well because so many games (and their UIs) are build around the simple mechanics of pointing at things. With which touchscreens aren't bad either, even if in a slightly different way (in some aspects worse, in some other better) - but they are also more conductive to few other types of interaction. Especially if the UI is via slightly nested, scrollable lists - which also always worked better on joypads (unfortunately way too many releases didn't remember that, trying to transplant "pointing-UIs"), and lessen the need for keyboard (which might be also, perhaps, finally supplemented by voice commands by then). Heck, where adventure games are still thriving, they have mostly just ~such UI (and OTOH maybe the purely "pointing at things" point'n'click ones weren't so great after all, if they sort of died...)
And then, nothing would stop you from just having a bt joypad, etc.
...but I can see people very much NOT preferring a waste of "could just as well have a separate device" (though "the hub" might as well be not the tablet per se, but for example an evolved set-top-box of sorts - it seems to be the aim of Xbox division ...then there's Apple TV and particularly how Google just bought a widely used line of set-top-boxes in Motorola, so who knows what might become of Google TV)
Overall, you again remind me a bit of "PCs won't supplant Amiga for gaming" (and remember, they were more different than they look at first sight - for example, joystick was the primary gaming input method before that transition)
BTW, are you known from such accurate past predictions of tech landscapes "in a decade"?
If the best games available at the time are played on tablets, I won't be playing them.
If the best games available at the time are played on tablets, gaming will truly have taken a huge step backwards