Almost every car company does something similar and has as long as they've had on board computers.
VW/Audi/Porche are all the same company and generally share the same electronics. A lot of gauges and features are considered "premium" so they just disable them for VW branded vehicles. There's also regional feature lockouts; IIRC North American VW's can't have their fog-lights and headlights on at the same time but you can enable it through VAGCOM.
I don't see that happening. The US puts large tariffs on imported cars to stifle competition. That's why if you look at Japanese cars in Japan or German cars in Germany they're often much cheaper and more powerful than their American counterparts.