While the 20ms latency on the Remarkable 2 is very impressive, let's please not say that users "cannot perceive the difference". At best the latency "does not bother" users. There are whole swaths of professions for which 20ms is a huge amount (professional gamers, musicians, etc), and even personally (And I generally view my lag perception as quite poor) the 20ms on the remarkable was noticeable enough that it did not feel as nice as having a good pen on paper.