If you're a Japanophile and a gadget freak, there are few better feelings in the world than stepping out of the subway and seeing stuff like this:
http://www.freyburg.com/realworld/shibuyamay2003-Pages/Image4.html
Of course, after a couple of weeks, you're all "yeah yeah, robot dog cell phones, whoopee," but for that first little while, all the bleep-blappery is pretty intoxicating.