There were two places E3 attendees could try out Sonic Colors for the Wii. The first was at Nintendo's booth, where one demo station was set up. The second was at Sega's booth, where multiple demo stations where available.
When it comes to Sonic games, Sonic Colors is the next major release. Takashi Iizuka, Producer, pointed this out during a presentation and said Sonic Colors is the follow up to Sonic Unleashed.
In the past fifteen years in his existence, Sonic has crushed Dr. Robotnik (Eggman) multiple times, bounced around in a pinball game, raced on hoverboards and was the face of Sega for many, many years.