Since the SIXAXIS award thread was closed due to a lot of fanboy trolling and I wrote this whole thing up, before it got locked, I'll post my thoughts here since it's somewhat related...
If PS3 launched with a similar innovative game similar to that of Wiisports, demoing the ability of SIXAXIS, then this may be a different story. But Sony seemed to have just tacked on the motion-sensing ability of SIXAXIS, without focusing on what it can/should really do, leaving developers the responsibility of showing it off at launch (which was almost non-existent).
I believe that SIXAXIS can do what Wiimote does, but using it in that fashion wouldn't feel right and there's no strap. I can imagine swinging SIXAXIS around for most Wiisport mini-games. However, it wasn't made for that type of functionality, since it uses the tried and true (and very old) dual-shock design. I guess after Sony got slammed when they first showed the "boomerang" controller, they decided it was best to play safe and go with the traditional PS controller design again.
I also think that SIXAXIS' Bluetooth reception is better than that of the Wiimote's sensor bar. That WIRED sensor bar is quite annoying, as you have to position it just right, IN FRONT of where you're going to be using the Wiimote. Unlike Bluetooth, where you can be anywhere in the vicinity of the PS3 and it'll register.
Too bad there's still that glitch where the connection between SIXAXIS and PS3 get cut off and it won't respond for 3-5 seconds. It doesn't happen often, but when it does, it's extremely annoying and can critically mess up gameplay. If Sony fixes this issue and start releasing fun/great games (either 1st or 3rd party) that can make great use of SIXAXIS's motion-sensing ability, then they really would deserve this award. But the question is, when these games will come out and if they'll be able to take steam out of the Wiimote.