[NBJack]

I suspect you'd lose the sense of depth that helps make the plane feel less small. There's also a safety factor for situational awareness; many carriers require shades to be open for the cabin crew to figure out the safest side to evacuate on in an emergency.

[bombcar]

You could do something with mirrors, but the safety cards reference looking out the windows before opening the emergency doors, so I bet you need at least SOME.

[ares623]

No, no we need more technology, more software. How about webcams and LCD panels in place of the windows?

[throw1234567891]

Why fly at all? Just buy a large TV and sit in front of it. Get a ventilator to simulate wind, and a toilet freshener for a scent.