“The future is already here. It just isn’t evenly distributed yet.” – William Gibson.
I have seen the future of roleplaying PDFs, and it is EABA v2. Check it out.
Essentially, it lets you roll dice, update character/vehicle/NPC sheets, track wounds and treasure, draw maps etc. all inside the PDF reader on a tablet (or a desktop, but seriously dahling, how 20th century!). I especially like the dice roller, which inserts your last die roll as part of the header – things like Dicebook are promising, but the dice roller gets in the way of reading the text; not so with EABA v2.
You can download a free quickstart version of the rules here with all those snazzy features in, to experiment.