But here I was thinking and now will share this is not a tablet issue at all. Even the "training tablets"* should be fine if you create some PDF and use any number of PDF readers. The ability to display static content is pretty much a done deal.

HOWEVER when you want to incorporate video you find that not all Android tablets come ready to play the video in how you encoded it.

Are you finding folk taken aback over video encoding?
Bob

PS. "training tablets" in my definition are those 99 buck models that folk snap up and learn or get trained about how a slightly more expensive tablet would have been a better choice. Often the training includes finding out how lacking support is in this price range.