Your TV's USB port is a nice feature, but it's not a major selling point. Most people purchase a TV for watching content, but it's capable of more.
Modern TVs come with various ports, including HDMI, USB, and Ethernet. The value of these ports depends on the situation. For instance, the Ethernet port may not be useful if the TV is far from the modem.
The USB ports can be useful, but their utility is limited. For example, plugging a Roku Streaming Stick into the TV's USB port can be convenient, especially with the newest model, which can draw power directly from the TV.
With the newest model, you can get power directly from the TV's USB port instead of having to be plugged into an external source.
However, even this feature has its limitations. Overall, the TV's USB port is not a key factor in the purchasing decision.
Author's summary: Smart TV's USB port is overrated and has limited use.