Not sure I understand your point
But Windows 8 works with pretty much all the existing Windows 7 drivers. I have yet to find any existing hardware or software that works with Windows 7, but won't work with 8.
Yeah, if you have some 15 year old sound card or laser printer that you're determined to continue using, you will likely have a hard time finding a suitable driver for Windows 8... unless there is already a driver for Windows 7, in which case it will almost certainly work with 8.
Rick