There are a lot of high quality PC laptops available for under $1000, and Win7 is more than "rather nice". Nicer than OSX some might argue. Ever heard of the company "Quanta Computer"? They build Apple's computers...and Dell's...and Gateway, Fujitsu, HP, Lenovo etc. etc. Apple doesn't build their own systems.Yes you do usually pay a little more but for that money you get better build quality and the ability to run a rather nice OS.
The actual components are exactly the same - Intel CPU, Nvidia graphics and so on. Granted, the chassis are rather nice, but the $999 Macbook comes in a cheap plastic shell, yet only has a 120GB hard drive and 2GB of RAM. $999 buys you a much nicer PC than that. The aluminum body and extra 40GB of hard drive space costs you an additional $300 - 50% of the cost of a fully featured PC laptop.Sure you can get far *cheaper* machines but they usually are filled with junk components so as to bring the price down.
You need to read up on some specs. This might have been true several years ago when RAM was very expensive, but not anymore. Only the very cheapest systems come with Celeron processors, the others come with C2D 2 GHz and faster CPUs just like the Macbook. Entry-level PC notebooks typically come with 2GB of RAM while mid-range systems come with 4GB. Even Apple's $1999 Macbook Pro only comes with 2GB.I admire the fact that Apple don't pump out countless machines covering every price bracket, resorting to some machines with woefully underpowered processors etc.