the current generation iPad Pro with the Apple stylus. If you want to see a mini version of this for yourself, you can try a random Android tablet with a stylus vs. At 10ms (1/100th of a second), the latency is noticeable, but the experience is ok, and at < 1ms the experience is great, as good as pen and paper. At 100ms (1/10th of a second), which is typical of consumer tablets, the experience is terrible. If you don’t want to watch the three minute video, they basically created a device which could simulate arbitrary latencies down to a fraction of a millisecond. There’s a great MSR demo from 2012 that shows the effect of latency on the experience of using a tablet.