Oh, that's a deal-breaker for me.
I currently have a Remarkable 2, and the handwriting latency is imperceptible - it feels like I'm writing with a physical pen. However, the latency of doing anything except writing is very high - it takes almost a second to undo/redo or open the pen palette, for instance.
The advertised 60Hz display of the Daylight and the underlying Android platform (that makes it possible for me to write my own applications, something that is technically possible but difficult and unreliable on the RM2) made it sound like an upgrade, but if handwriting latency is bad enough that it doesn't feel like paper anymore, I think I'll stick with a combination of my RM2 and desktop.
Theoretically this is something fixable in software (in which case I'm sold), but from what I've heard about Android, it's very much not latency-optimized in either the video or audio space.