I finally got to handle an iPadPro and it was even better than I expected. From the outside it doesn't seem all that much bigger than the normal iPad and it is surprisingly light - but the screen area is absolutely bigger - and I think it will make a huge difference to musicians.
The larger screen means a couple of things from my standpoint. First, I can convert a normal etude book to an iPad project without needing to take the original Finale files and stretch them open the way I did for the normal iPad. Now we have enough room to go straight across.
Second, we now have enough room to make the duet books a real possibility. Consequently, I am prepping five or six duet books for use on the iPad Pro. They will be OK on the normal iPad too, but better on the Pro. I speculate that in a couple of years the Pro will be the pad of choice for first-time musician buyers and a very attractive step up for present normal iPad owners (like myself).
There is another tablet, from Sony, that is also very interesting. This is the DPTS1 and it has a 13.3" screen that is nearly as thin as a sheet of paper and is flexible (!). It has a stylus with which to make notes on the screen. It is not back-lit and it renders only black and white but it looks like paper. It can be so thin and light because it is pretty much a single function tool. It doesn't have a boat-load of apps made for it which would require it to be heftier. However, the price is pretty hefty at $799. (That price is in the ballpark for an iPad Pro too). Certainly something to explore.
This week I have been working on five duet books that I will send up to the iTunes store all at once. Stayed tuned then for other etude books that I still haven't made into iPad projects - now the flood gate can open and you will have more and more choices of things to add to your iPad library. Have a good week and thanks for your interest.