It's kind of a comforting thought - if there are deadly robots being sent back from the year 2748, that means the human race survived global warming and was able to invent time travel!
whats more comforting is that, if they are able to send back things into time then we would have enough computational capabilities to solve the time space anomalies and paradoxes of time travel.
This looks like interesting research: http://www.squicky.org/work/sca07gtw/
Anyone know much about motion capture? Is it something that is now doable at any sort of homebrew budget levels nowadays?