Bluetooth Headphone Adaptor What Can Bluetooth Technology Add To A Laptop?

What can Bluetooth technology add to a laptop? - bluetooth headphone adaptor

I am thinking of a USB Bluetooth adapter for my laptop, but I'm not sure what benefit I can give. Most of Bluetooth are still very expensive, and Bluetooth printers, headsets and all that, I can not Wi-up. Nor do I believe, as the son of the cable. But Bluetooth phones, the benefits you think?