I’d be surprised if it was related to patent law; hover detection is fundamentally straightforward with capacitive touchscreens and it’s just a matter of calibr

I’d be surprised if it was related to patent law; hover detection is fundamentally straightforward with capacitive touchscreens and it’s just a matter of calibrating the capacitance curve, and deciding whether to expose a hover state or not. No, the reason is just because it’s too fiddly and too unreliable (to use, I mean, more than the touchscreen itself being unreliable, though the more sensitive you tune it the more that will become a problem as well). Apple had their 3D Touch and they dropped it because (from what I hear, I never used it) it largely confused people due to non-obviousness/non-familiarity, required more care to use accurately than people liked (or, in some cases, were able to provide), and could become unreliable. I’ve used a variety of “normal” capacitive touchscreens that could be activated anywhere from a few millimetres from the surface to requiring a firm/large-surface-area touch. It’s all about how they’re calibrated, and how much they’ve deteriorated (public space ones seem to often go very bad astonishingly quickly). Most recently, in Indian airports the checkin machines that you can choose to use say that they’re touchless, that you can just put your finger near and it will work and isn’t that all lovely and COVID-19-aware of them, but on three separate machines I’ve tried it very carefully and couldn’t get it to activate before touching the screen.