I use a computer a lot, and I have an expensive keyboard and mouse. I’m the target market in a sense; if there was a compelling enough upgrade to either, I’d probably buy it.
I can’t imagine what software features they could possibly offer that would qualify, doubly so as a subscription. I picked my mouse because it has lots of buttons, a responsive sensor, low-latency wireless, and it runs on a standardized replaceable battery. It would be hard to improve any of that with software.