My own feelings about the future is that mechanisms will take second place to story-telling. You can already see that happening with the number of Legacy games on the market.
Quotes about stories
With the advent of computer games, story, and gameplay, two age-old enterprises with very different sets of rules, show a similar duality. Storytellers are now faced with a medium where they cannot be certain what path their story will take, just as the physicists found that they could no longer be certain what path their electrons would take. Both groups can now only speak in terms of probabilities.