Google's Android for desktops and laptops is called "Aluminium – OSnews
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But I think anyway Android is going there, just because mobile OSes are going towards "convergence" (if that's the right word?): use your iPad as an iPad, or connect it to a dock station and use it as a computer (with this brand new concept Apple invented that's called "windows").
It's slowly coming on Android as well. And to be honest, the day one can have a docking station at home (or at the hotel, airport, ...) where one plugs their smartphone and get something that looks like a desktop, I'm pretty sure most of my friends and family won't have a need for a computer anymore. They mostly use ~a browser~ Google Chrome already (and Word/Excel for work, I guess?).
And I could totally imagine companies buying smartphones + docking station to their employees instead of laptops + potentially a work phone.