We saw the Justice League in action on Smallville tonight, which is definitely moving more and more toward a straight up superhero show. Sure there have been paranormal abilities from the beginning but we're starting to see costumes, teams and Lex is definitely in serious bad guy territory.
In fact, the only thing I don't love about the direction of this show is that Lex is less interesting as a bad guy than the guy who might one day become bad.
An excellent episode written and directed by Steven S. DeKnight, a former writer for Angel who's good with action sequences.
For those who would like to see what the fuss is about, I recommend the first season very highly. Heck, just go rent all of it. A really great show in the tradition of Buffy and the X-Files.