Expect a Blu-Ray addon player for the Xbox 360 very soon. Microsoft even suggested as much, that if Blu-Ray won then they'd consider releasing a standalone player for it. I wouldn't be at all surprised to see one in the very near future (probably already one in development).

But you're right, I know a fair few people who were considering a PS3 but wanted to wait until the format war was decided. So now they can get a combined console/Blu-Ray player without fear of the Blu-Ray films becoming obsolete in the immediate future. I know people seem to assume that "over the air" or even Solid State Memory will replace physical discs but I think that's still a good few years down the line.