Cables are terrible, but we're not quiiiite to the point where we can just snap our fingers and make everything wireless. The iTwin seems like a legitimately cool stopgap between the two. You plug its two halves into two computers, and it lets you access both machines' files from either computer.
It works by sending your data over a shared internet connection in AES-256 encryption. You can remotely edit files on the connected drives, and the transfer speed is apparently only limited by your up speed. It's billed as being a more secure alternative to cloud storage and remote access software, and more convenient than just ferrying all your files on flash drives. It's $US100 and available now. [iTwin]