What are the business lessons from the 360/PS3/Wii generation?

[astrosmash]

I would say three lessons to learn:

1. The best possible marketing tool is your existing customers. Make some games that are very accessible and fun for parties.
2. There is no demograph you can't target a game to and sell it if you know what you're doing.
3. New ideas sell more consoles than taking existing ideas to the next level.