Let's break it down:
PS3: Sturdy vessel for the mass-market. Large market share built in part through casual peer-pressure. Sequel-itis. Inevitable franchise fatigue. Four or five diamonds in the rough per year, amongst a glut of pretty but poor titles. The new "VCR".
360: Reliable console for the casual, or materialistic gamer. Low number of quality exclusives. Halo's 2.5, 3, 3.5, & 4 stand alone with core fans. May become the "Madden Exclusive" console after a MS/EA merge. The new "3D0".
Revolution: Integral console for genre innovation. Suprising number of high-quality exclusives & adult-oriented titles. Motion-tracking may be copied by the competition before end of lifecycle. The new "NES"
P.S. Do I sound like a Nintendo fanboy? Perhaps. But look me in the eye and tell me that "Baby-Step Sequel part XI" played with a dual-analog is exciting, fresh, or new. The industry desperatley needs another quantum leap forward.
P.S.S. There is no malicious fan-bashing in these words, we all play video games. I intend to own all three consoles.
I'll pick up a 360 sometime in '09, to enjoy Halo and exclusive PC ports.
I'll pick up the PS3 in its second year, likely in Oct '07 with the next-gen GTA.
I'll pick up the Revolution on its launch day, with Twilight Princess, Mario, and That Game Nobody Saw Coming. Oh, and I'll be playing the hell out of next-gen ruduxs of GoldenEye and Perfect Dark, online of course....drool.