Aye, Nothing can hearken to the feel of stuff that, when you're done, you can feel it - the brush strokes, the coarseness of the paper, the incredible fact that you did it all without hitting undo. The experience alone cannot be duplicated on any digital form. If anything, CG media are dispensable. I mean, if you do away with traditional media and a few years later there's a global crash or all the computers die or something, what then? But if you do away with CG media, you'll always be able to go find some clay and mix your own paints, or some chalk or hammer and chisel.
Sorry, I don't actually have anything to say about tablets. I've only had one once and it was cool, but that was for just like a couple months and I hardly used it. I don't even know what kind it was.