Personally, I think viruses are a huge untapped resource. They're basically genetic mail-carriers. What's in the code can be up to us.

The trick would be to build in suicide protocols in case they ever got out of control.

(Imagine: a labby drops a phial and in a week the whole world has red hair)

I always loved the idea of the moving sidewalk. I go out of my way to use them in airports (monorails too!).

However, I think the proverbial moving sidewalk will take the form of autonomous 2-4 passenger pods that can drive alone or be linked magnetically in a train. All the whiz-kids at various design schools are going bonkers for that concept.

Yeah, pretty much there really is no such thing as a free lunch in Canada. Every "contest" involved a "skill-testing question". It's usually a simple, multi-operation arithmetic problem.