I doubt we will see 3D Printers in most classroom in the next 2-3 years. It's just too expensive, and too complicated to teach faculty how to use them. I'd say a more accurate prediction would be in the next 10 years. HP will introduce 3D printers for manufacturing, not targeted towards consumers (my prediction). I don't think Google or Apple will acquire any 3D printing companies, but again I wouldn't have guessed google would have acquired Android either.