They have crazy eyes haha :P I do think that the phrase "it all comes together" means more than what a lot of people have said with just looking at it with face value. I honestly can't remember BW or even XY getting as much hype and emphasis that SM has been getting. There's not a whole lot I can say, but there are indicators that these games are going to be story-driven and pretty legend/lore-heavy; both the official websites and the E3 presentation put out hints that there's a deep story in these games. The last time that's happened was the pre-release coverage for BW, and those games and their sequels have been the most story-driven main games thus far. So we could be looking at Gen 5 level storytelling or maybe even surpass Gen 5.
Aside from the theories, the thought of Gen 7 being the final one has actually crossed my mind. I doubt it though, because I would think Masuda and Ohmori would have said something or hinted at it during E3. I do believe Pokemon will come to an end eventually, most franchises do. If it ends after Gen 7, it may be picked up again a few or several years later, much like how Star Wars happened. I use Star Wars as an example because just like Pokemon, it's a worldwide phenomenon. Franchises that are a worldwide phenomenon don't go away that easily.