Not sure how it’s any better than the Logitech K400 or the Microsoft All in One keyboard, especially since those don’t need any special software support so can work with your Android TV, Apple TV, HTPC and essentially any other device that supports USB HID, and those cost only like $20-30 I don’t see this thing being sold for less than $150-200.
I have only owned the Logitech K400 before and its touchpad is rubbish. I threw it out because it was so frustrating to use. Lots of accidental taps when just trying to move the mouse pointer and issues like that.
I'm using the Logitech K830. I don't have many issues with the trackpad on that model. It's not great, like your average Windows laptop's trackpad, but I nowhere near throwing it out cause it's so bad.
Not really since there is little chance for this to work well without additional software which likely would limit its functionality, also it doesn’t seem to matter that much for a couch keyboard and if you want smaller there are smaller keyboards.
Because these types of trackpads need special drivers these days e.g. windows precision drivers.
Even basic things like palm rejection is done in software and for this one to switch between keyboard and trackpad in the fly you’ll need very good software that can predict just what you were intending to do.
Most "windows precision" touchpads are handled in Linux with just one module. Even Apple's Magic Trackpad can show up in system as a regular mouse (although with limited functionality).
Palm rejection is a thing that kinda makes sense to handle in software. For this thing, I'd expect firmware to be actually a bit beefer than usual.