.. Definitely get a screen protector, haha.I am getting the pencil when I get my Pro for a educational tool for my kids. My 5 & 7 year old kids will love drawing on the iPad and I am sure I will enjoy it for certain graphic applications. As mentioned above, there is certain to be a extra charging option. It's the Apple way. Owning a Apple product s like going to a 5 star hotel. There is going to be alot of side tipping and side charges for the price of admission.
That's my biggest worry with such an expensive tablet with a giant beautiful screen. Tiny dust particles can, and do get between stylus and screen, and unless the glass is much tougher than the iPad3 I have, drawing with a stylus will eventually likely scratch the glass. Which is pretty traumatic.
When using my 3rd party styluses on my ipad3 I now use a matte screen protector which makes it feel a lot more like paper (or a Wacom tablet) - with a screen as insanely nice as the iPad pro though I think I'd be reluctant to make it matte and lose a little picture quality - I hope the pencil tip is rubbery enough to stop it from feeling like sliding around on glass, as that's not very natural feeling at all.