You can sit on a bench.
Edit: Seriously though, there's not much else to say after reading the majority of posters here; pretty much everything has been said. I'm 30 hours in and cannot stop playing it. The little touches like being able to see TMs compatibility in the menu, draw distance, restore option, diverse areas, 3D Pokemon models, gorgeous animations, gen one starters, mass variety of Pokemon in each route, when you use Surf, you see your actual Pokemon instead of that blob. WHAT ELSE DO YOU NEED :D
Edit (2): The online is the best in the series. Everything is streamlined right from the bottom screen, incuding features like the Pokemon, Pokedex, Bag, Save, etc, all in one button press. PSS is extremely fast allowing trading, battling, wonder trade (highly addictive), and a few others I forgot. Lists show players already met, friends, passerby, and aquatainces.