Yes you love your mac because of the seamless integration with the hardware it runs on, same as iTunes and The iPod, if all sorts of manufacturers start using Mac OS X, then you'll have the bloated drivers problems windows has, the reason you love Mac OS X is because of the integration of hardware and software.
Why do we keep getting this decade out of date myth? Back in the old PowerPC days, almost every chip in a Mac had to be custom made. Both the Mac and computer hardware have changed a great deal in the last decade. Five years ago most PCs ran one of many unrelated chipsets from a bunch of different third party manufacturers. Since then, things have become much more make like. The third party chip makers have more or less left the business. Via and SIS are technically still around, but nobody uses them. ATI got bought by AMD, became their first party chipset supplier, and obviously stopped making chipsets for intel CPUs. The only third party company to have any real sales is Nvidia and even with the excellent 9000-series IGP chipsets, that future is in doubt.
Chipsets themselves have also evolved into family groups. Why make a bunch of chipsets with different drivers, when you can make different versions of the same chipset. Intel is now down to two chipset groups. The high end desktop and workstation chipsets merged with variants of x58 replacing both the x48 high end desktop chipset and the 5400 for dual CPU workstations. Video cards have done much the same. Support chips have always.
Lets compare my iMac with the Dell studio hybrid by parents just bought.
CPU
iMac Intel Core 2 Duo T7700 2.4ghz
Dell Intel Core 2 Duo T5850 2.16ghz
Chipset
iMac intel PM965
Dell intel GM965 (used on white Macbook)
Graphics
iMac ATI Radeon Mobility HD2600XT badged as HD2600Pro
Dell Intel x3100 graphics (used on white Macbook)
Audio
iMac Realtek HD audio
Dell Realtek HD audio
Wireless
iMac Apple Airport extreme-N (broadcom chipset, Atheros and intel wireless chipsets used on other intel Macs revisions)
Dell 1505 wireless-N (broadcom chipset)
Almost all Firewire, wired Networking, hard drives, optical drives, etc supported natively in Mac OS X
This isn't an aberration. A good 95% of the intel PCs sold in the last three years are fully compatible with Mac OS X's native drivers. That's close to 100% with intel laptops. The only difference between what Apple brings to market and what you'll find on the PC in the next isle is the firmware chip and the case. The case of course does not need a driver.