for lead sheets it should be fine, for score reading you can always set things up so you have 2-3 lines of the score only and use a bite switch to flip forward

for lead sheets it should be fine, for score reading you can always set things up so you have 2-3 lines of the score only and use a bite switch to flip forward (depending on your instrument you can also manage with a footswitch of course), but yeah, I agree that it looks a little bit cramped. For larger there is also the samsung galaxy view (18") but it's been panned quite a bit in the reviews for its size so not sure how many other tablets would be available in that format. An alternative would be getting a 21:9 1440p monitor and putting it on your music stand with attached some sort of mini-pc (intel nuc with displayport, say) but that would not be nearly as portable as an ipad, it would have very few compromises though and paradoxically not cost that much more than a fully loaded ipad pro (although you'd lose the pencil, but if money is no object you can always get a cintiq). I remember many years ago (in the mid-late 80s maybe?) somebody coming out with an "electronic music stand" (monochromatic TFT LCD screen that was probably maybe 640x400 and 15"?) and it seemed so sci-fi at the time, amazing how many options we have now, will be even more fun once AR becomes good enough and you can have your AR music stand with you anywhere you go at the push of a button...