What about video cards? You do not want to be stuck with on board intel video? also putting the video chip behind a few hubs and convertors will slow stuff down as well.
Also there is cable card pci-e cards coming as well?
OK, this is just for fun.... speculation just for the fun of it.
Quit thinking along the lines of how LP will make an existing "genus" of computer better. Start from scratch. Imagine you are designing a personal computing device for the first time, with some pre-conditions.
You have to allow for optical drives, and you still have to be able to talk to the legacy devices - though over LP now. Remember, LP can (and probably should be) used for internal connections too.
So... does the motherboard as we know even have to exist? I think yes, simply because computer makers are geared up to build computers around it. Except for Apple. We've seen how Apple will push form factors to the extreme, if it simplifies the system. Initially, perhaps they use customized video cards that have an internal LP connector where the normal display port would be, and the short LP cable is routed to connect to the internal LP controller. (Gamers would have a whole forum devoted to discussing how many displays you can connect to a single LP port before Call of Duty is noticeably degraded.)
Same thing for the internal drives - the HDs are connected by internal LP cables to the LP controllers. But - do the HDs
even have to be internal? If Intel can bring the time it takes for data to travel through the controllers at either end to same speeds as currently seen, then the HDs can be 33 metres away will still be as fast as if they were internal. Same thing for video cards, other high-bandwidth peripherals that were formally limited to being close by.
The bits and bobs that make up a computer now (I'm thinking only of towers here) are shaped the way they are because they need to physically fit into holes (HDs), slots (expansion cards), etc etc
So - if I was designing the computer I would put the main LP controller, the CPU, maybe the RAM into a module more or less the size of a Mini, though maybe thinner. Top and bottom would be more-or-less flush LP connectors that would snap together with other modules, Lego style. You'd need a module for the video controller. And another one that acts as the hub - that has the external LP ports, plus whatever other ports you need for legacy support. Or you could have more than one hub stacked together to get the combination of legacy ports.
You'd also need a module for the HD (or drives).... but they could stack or they could be located somewhere else and connect into the computer through the external LP ports. They would still be seen as "local" though.
etc etc etc It might be possible that one day you could had "CPU" module if you needed more cores.... who knows....
Likely? Let you know on the 10th....