The ones for $200 or so are pretty much just regular electric kits. The one you saw is similar to a TC-3 "racer" kit with a really detailed body, drift tires and some concourse pieces...like an exhaust pipe and disc brake rotors.
I think they're pretty cool. One guy at the track last night had an S-15 with a Frank's Bodies paintjob and it looked awesome. I'm going to ask Santa for one for Christmas.