Blizzard president Mike Morhaime says, "With StarCraft II, we'll be able to do everything we wanted to do with the original StarCraft and more ... We recognize that expectations are high following the long-running popularity of the original game, but we plan to meet those expectations and deliver an engaging, action-packed, competitive experience that StarCraft players and strategy gamers worldwide will enjoy." Meanwhile, IGN's man in Korea, Charles Onyett says, "SC2 looks, at least visually, strikingly similar to SC1 - both in unit and map designs."
This has been Blizzard's longest gap between releases. Blizzard had a consistent two-year release schedule (not including expansion packs) since 1994 with the original WarCraft. That streak was broken in 2006 when StarCraft: Ghost was
[Thanks to everyone who sent this in!]
Update: Here are some higher quality videos care of Game Videos.