The One Connect Box has all the ports including power, HDMI, ethernet, USB etc. and the TV has just one proprietary port where you connect the One Connect Box.
It is - at least you can then exchange the box with the ARM CPU when the new versions of Netfix and Youtube apps start requiring 16GB of memory and a teraflop CPU, without having to chuck a screen that works perfectly fine.
Of course you can also just by an external Nvidia Shield unit and connect it by HDMI, like you can now.