Anyway, you mentioned phones: 16ms from touch to response on screen? That's hard for me to believe and I'd love to read up on that, if you got any sources. The ones I've found were not that great but don't paint such a good picture. [0] is an article claiming touch sensors scan only once per frame, aka 16ms at the time. [1] claims ~85ms to response on an iPhone 4, ~55ms on iPhone 5. How were you able to easily beat those by such a margin?
[0] https://www.anandtech.com/show/9605/the-ios-9-review/9#Input...
[1] https://www.cnet.com/news/iphone-5-touchscreen-2x-faster-tha...
Nowadays you have 120hz scrolling on the ipad and the very fast responsiveness of things like the apple pencil, which shows you that responsive hardware and software is definitely possible.
Performance is always a business decision. Most people don't want to pay for it.