There is already infinite space for windows. By moving them into physical world, you're actually imposing a limit on the available space.

I meant more like an infinite sized monitor. But I understand your point. That said, there's something appealing to me about the idea of just moving my head to see the info I want vs. switching windows. I already do this with 2 27" monitors and having even more 'space' to put visible items and just look around sounds great. But I like new and shiny things.

Sounds really inefficient (and that's ignoring the eye strain, headaches, sweaty headbands and nausea).

I'll use vim and you can wave your arms around like Cumberbatch-era Sherlock with your mumble-powered magic hat and we'll see who's the fastest!

Ever heard of workspaces?