The reason why it's so difficult to manufacture a webcam with a remote is the form factor. You cannot put that much hardware into a camera without having some sort of large form factor. That's why all the conference cams have such wide bases because they need to be able to fit in all the standard output requirements while also being able to receive wireless input from a remote. It is also expensive to output HD resolutions because of the lenses and then on top of all that you need to make the camera communicate with the remote hardware. That's going to cost a lot of money.
If you really want a remote control camera that also can output via USB 3.0 you also need a pretty robust computer unless you go with a capture card but even then, you need to know what components are compatible.
The best PTZ cameras that have all the specs with a remote cost around $1000 -$1500. If I had to choose one, it would be the epiphan Lumio 12x and it costs $1500 USD. I like it because it is a better deal than the top Logitech conference cam with all the same or better specs with the bonus of being remote controlled. The top Logitech cams are not remote controlled.
However, I personally think having a remote controlled camera is overrated. It's not true optical zoom, (digital zoom just enlarges and crops your image for the appearance of zooming and you lose quality), and kind of gimmicky. Instead, you can increase your cam time by fiddling with your webcam to get just the right stuff into frame and that translates to more money. I see those girls using remotes zooming in and out and panning and it just gets kind of annoying. You can't really use a remote controlled camera for making clips either without it looking extraordinarily amateur.

