I managed to get stuck in a phone call for almost 20 minutes just before the announcement started, but I got back to the office in time to load up the OI IRC channel and a stream that featured the announcement. It was late, hadn't started yet. I had just made it back in time.
And then my PC crashed. Took five minutes to fix. The stream was over when I got Internet back. Not exactly a ruined day for me, but kind of annoying when it happened.
As for my reactions to the trailer... give me some time to sort my thoughts out, and I'll have some sort of essay up on it later.
Island looks reasonably small from this angle... Maybe there will be a lot more islands/lots of travelling between different areas in this game?
Well, Hawaii is a chain of islands. It makes sense to have players travel from island to island as the game goes on. Hopefully without too many long, tedious periods of surfing. What we see there is obviously just the starter island.
I think they'll pull off the tropical theme well enough (Hoenn was quite good, after all), but somehow I feel that fixing the notorious shortcomings of the Ice type won't exactly be the focal point of Pokémon design this time either...