AFAIK you’d be hard pressed to hit 150mbps with your own local media.
And any streaming services will use way less - Netflix and Hulu recommend a mere 16Mbps at 4k for example.
Also, just learned it's still 4k 60Hz. So forget 120Hz gaming. Game streaming is likely to become a default in near future at the hardware proces we see, so limiting to 60Hz is really cheap of them at this point.
As in, it's a $300 device that still uses old hardware and standards.