How much is Vista worth?

PCM2 writes: "Chris Null at Yahoo breaks down the advertised new features of Windows Vista, line by line, and comes up with an estimated value of each (based on what they are replacing or what it might cost to buy third-party software to do the same thing in XP). Windows Sidebar scores a net value of zero, as does Windows Calendar and Windows DVD Maker. Media Player 11 scores a buck. Nonetheless, Null's final estimation is that Windows Vista is worth about $133."