Actually, most of the technology inside was designed by US companies, but the decision to assemble these kinds of platforms and focus them to the niche gaming market is driven from the Taiwan ODMs these days. Many individuals (and I know a few) design and assemble their own versions of these platforms. I would say that there is a lot of interchange between the US and these Taiwan ODMs
Many accessory products for Apple products, and even a few for other SmartPhones and tablets. Lots of interesting USB hubs and devices. The futures area was occupied by universities this year, so more academic then product focused.
Why don't our government export departments set it up for groups of our young designers to go out to Taiwan and other emerging markets, not necessarily to conventions but into industry so they can see what can be done in those cultures?
It takes an outsider's view to innovate in some situations and these emerging markets are where we need to be selling our future products.
What I am saying is that these extreme gaming platforms are beyond belief but nonetheless present many opportunities for Western designers.