Re: Nanotechnology
I'm fascinated by the potential applications in high-tech materials. We could have ubiquitous lightweight, durable, superstrong materials and video monitors on every surface and so on, but even cooler to me are materials that can manipulate themselves. Imagine clothes that can change their shape (say, fitting themselves to an arbitrary wearer) and color/pattern (there's those video screens again) and "heal" their rips and tears. Furniture that can collapse into a small container, then expand and become rigid again when called upon. A building that produces and removes ornamentation (or even doors and walls) as needed. Beyond that, you could theoretically eliminate much of the need for conventional motors and servos in machines. Think of a winch or an automatic door that operates by contracting its "muscles." We already see the use of memory metals in miniaturized robotics; imagine if you could build large-scale robots on similar (but much more flexible) principles. When you ditch the need for heavy frames and motors, suddenly humanoid robots become much more feasible.
And these are all naive "World Of Tomorrow" applications. The reality will probably be much different and cooler in its own way. Maybe this is "whatever dude" stuff, but I find it highly interesting.