I suspect the problem is that many (most?) PCs don't have Bluetooth built-in, so to sell PC peripherals you'll need to either bundle a BT dongle, be very explic

I suspect the problem is that many (most?) PCs don't have Bluetooth built-in, so to sell PC peripherals you'll need to either bundle a BT dongle, be very explicit about requiring one, or bundle a (probably cheaper) non-BT dongle. Seems to be getting better though; a quick look at the local price comparison site gave 419 wireless keyboards, 296 of which are using Bluetooth.