Really. Just because they changed the name. Interesting theory you have there.
This isn't exactly brain surgery mate. Have you not noticed PC gamers getting more and more straight console ports as time's gone by?
Now they're renaming UT2007 to UT3 and it's gonna come out on the 360 and ps3 aswell. Do the math.
If UT3 ends up with nearly the sort of quality that UT2004 had on the PC, I'll eat my words. I'd love to be wrong about this.