"One problem I predict we'll be seeing is that as the robots here get more complicated they can only get larger."
Technology almost always gets smaller with time...
Think about it. Eniac was huge. The first cell-phones were bulky. The first TVs were huge compared to their screen size... a 5" display was the size of a current 21" TV or thereabouts. The problem seems to be making things too small (like those dang tiny Nokia phones) rather than too large.
I can't think of one electronic-era technology that has gotten bigger with more features packed in... maybe you can, but I can't.
Oh, and Blue, for something very disturbing, see this:
http://www.gracelessland.com/CGI-BIN/g2000.exe/bio?bio_blue.txtSome people have way too much time on their hands...