3) Can strongly intellectual jobs be reformatted in a more physical way? For example, in the future, could programmers and mathematicians manipulate symbols in the air, like Tony Stark does in Iron Man? This would at least activate significantly more visual cortex than symbols on a screen.

I was going to make just such a point about programming. If one were to look at coding as a means of controlling data flow, or controlling state machines or decision paths, then 'coding' by means of drawing up an active flow chart and manipulating this spatially, much like what Stark did, would be awesome fun. This lets me visually and in space stack the scaffolding of ideas, blocks, functions and subroutines, 'see' the connections between blocks and watch the -- the flow of control and data, yank things around 'literally', and so on and so forth.