A laptop for every student?

Well! There's a suggestion! Scott at Dangerously Irrelevant has costed out what percentage of the US GDP would be required to provide a laptop to every teacher and student.

Does every student need a laptop?
Would classrooms be more relevant if every student had a laptop?
Would trading in paints, brushes, glue, scissors , sporting equipment and even musical instruments, for laptops make classrooms more (or less) relevant?
At what age would a student recieve one? The requirements for year 1 are very different to year 12.
Could the money be spent more productively elsewhere? (Building maintenance, paints, brushes, transport, health, water resource management, rollout of infrastructure.)

Speaking of infrastructure...would the current infrastructure that's already in place cope with such a massive hit?

Thanks Scott. As always, you got me thinking.