I was in Germany this year and my rental car (
) was a 5er. I definitely watched TV on the standard monitor.
The US has two problems as I see it.
1. There's no way BMWUSA is going to allow that function to work in a stock BMW in our litigious society.
2. Even if you could get a chip to make the US model enable that function like in Europe, the 2001s are apparently using different NAV screens, so someone may have to design something from scratch rather than copy whatever settings are used in Europe.
There are probably other technical issues!