The new MacBooks are gorgeous. I have another year or two of useful life on my current MacBook and I normally wait until there's a new OS release to go with the hardware. I'm waiting for the 512SSD too, where the 256SSD then become commodity and shipped as the default drive; maybe end of next year.
Regardless, anyone looking for a new computer, I'd go with the MacBook now (but if you can wait, I'd wait until after January, buy stuff from Apple *after* MacWorld). For a PC, I'd go with the Dell XPS M1330.