I don't see why we aren't nearing a threshold where we can do all system interconnects over some specificed serial digital interface and a parallel one. Past a point, it becomes more logical than trying to optimize edge case performants of things (like how dvi is uni-directional raw video digraphs) you can just have some usb-like (but not usb, usb is ugly and tacky and a mess) digital connector for every peripheral from the monitor to the network adapter to the speakers, maybe even off one controller with software handling the handshakes to determine what everything is connected to.

And then get rid of sata/pci/sas etc internal connectors and just use the same interconnect hub as the external devices. Again, handshakes to determine device connectivity.

Wouldn't that be so easy? One connection to rule them all! I'm not trying to say it would be easy to get to, we are mired in a world where we look at a concept like this and say "how dumb, you aren't utilizing a bidirectional link with video feeds, or you aren't using the power connectivity to a network router, or stream based vs packet based trasport layers having speed / bandwidth advantages over one or the other. But wouldn't it be great to plug a new gpu into a real universal serial bus?