That is legitimately the one thing I wish was different about the RM2 - the screen is 1/3 or so smaller than a regular sheet of paper. If it were 1:1 with a sheet of paper, I would absolutely love this thing.
I see it's been replaced by the Sony DPT-RP1, though that's still expensive. At least this is proof it's possible and creates hope for competitors to emerge.
I have both the Sony and the remarkable and the note taking experience is not comparable. Since I bought the RM2 I've essentially not touched the Sony, the RM2 is so much better. I'd also add that I use the RM2 for reading and annotating pdfs a lot and I had the same thought about size at the beginning. I am a bit more twisted now, I'd definitely like a larger screen when annotating pdfs (just reading is fine actually), but I also think I would leave the device at home much more if it were bigger. The RM2 is a perfect size for always having it with me.