Can't beat the keyboard + mouse for general productivity. Touch, voice, 3d -- all of them have a certain, high-tech, wow-factor appeal, but except in limited circumstances, they all have massive practical flaws. I can sorta see where Intel is coming from: if you're just talking about the typical use-case of the average tablet owner, then yeah, maybe voice can be just as efficient as touch -- unless the user is in public or in otherwise loud surroundings, but then that's sorta the point: the exceptions can't be ignored when you're talking about usability.
Which is why we'll probably still be happily click-clacking away on our futuristic keyboards 100 years from now. 😛