[misnome]

We had a lecturer who tried this with an early tablet computer (c2005) and IIRC, onenote. He got about two or three lines of equations on the screen at once before scrolling it off the top, so there was none of the ability to slow down, comprehend, then quick transcription that moving onto multiple blackboards allowed.

Having the last 10 minutes of progress, or more in special lecture theatres - allowed cross-referencing and observation that is hard to replicate with pre-prepared slides or with a single window of view.