I was about to say, GoodNotes can be used in the same way, and that's just one feature of GoodNotes. It took me a while to realize that though, so GN can improve their marketing and design.

Muse should try to reach feature-parity with GN and/or lower their price. Then I think they can surpass GN, because GN wasn't designed specifically to replicate a thinking board/desk. Altogether Muse is coming out strong with a great design philosophy and marketing approach.