2 Megapixel can be more than enough. Is just full HD, time that Megapixel said something about image quality is now 15 to 20 years ago. But that doesn’t take away from the fact that the quality has yet to prove itself.
As for resolution, as a developer, I totally agree with you. I think QuadHD is even nicer, only that extra bar at the bottom of me could also have been included. But it may also be that the general public thinks otherwise.
As for “espionage” equipment, well then this just isn’t the product for you. In that respect, you can hardly buy a laptop and video calling is also difficult, then you just have to connect them separately. (This can of course also be done in hardware manager if you are not using them).
I don’t think the price is really competitive. A comparable separate screen with all features without the webcam costs 160 euros. For that 130 euros extra you almost have a logitech Brio, which has already proven itself and you can simply take the webcam with you to your next monitor.