Personally, I consider tokusatsu to be live action or stop-motion/puppet shows, that use practical effects, as opposed to computer effects. Granted, there's going to be both used, especially in newer stuff, but it's what the focus is on. Doctor Who is an interesting case, because while I'd consider Classic Who to be tokusatsu, as there's a lot of practical effects, New Who uses mostly computer effects, and I wouldn't consider it. Smallville I don't agree with being on Wikipedia's list at all, and Battlestar Galactica's the same as DW: older yes, newer no.
Reading both the English wiki page, and the google translation of the Japanese page, it seems that the term is supposed to reference to shows where the focus is on the effects.