Guitar synthesizers......

So here I was, in the car, listening to Pat Metheny's "We Live Here" CD. One of my favorite tracks on it is track 4: "To The End Of The World". It starts off with a nice bass riff, then the drums come in, then Pat comes in on guitar. Eventually, Lyle Mays chips in a nice piano solo. Then afterward, Pat comes back, soloing on guitar....or is it? It sounds more like some type of horn.

( Now why would a guitar player want their axe to sound anything other than a guitar? )