It's a legitimate question -- I brought the guitar to class last week, and my teacher asked me, "What's the point of fanned frets?" and I couldn't really answer. The one thought I had before I got it is: I've been really grooving on the baritone lately, which, at 28", is just a tad over the lower end of the fanned fret at 27.7" -- so it's sort of a baritone on the bass side, and a regular guitar on the treble side. So it's kind of the best of both worlds.
But he immediately helped me tune it so that I could play both the bass and the guitar parts of Starglue Sniffer on it, so ... he's still an awesome teacher.
But yeah, mostly the guys who are drawn to it are the ones that like to come up with lead licks and riffs -- the metal guys. Even more so than on 7-strings, there isn't a whole lot of anyone else doing anything else on it (I don't intend to play metal on it, although I will learn some metal).
PS The connector cable is called a speaker cable. Mesa Boogie is good stuff, I hope you enjoy it.