Would you spend money on a Xbox 360 250GB Kinect console if you already had a Xbox 360?

I was buying a game today when the sudden idea to buy a newer version of the console hit me, but at the same time the words waste of money slugged me in the gut. I asked someone I knew their opinion on it as they have the updated version saying that rumor has it the new Xbox 720 won't be even begun to be built till 2013 and they told me they'd just wait, but my thoughts are my Xbox 360 is a 2006 model and even though it appears to run fine I think it might be good sense I can afford it to buy a newer one. Anyone got an opinion?