StarCraft II--at least at first glance--seems like a major graphical upgrade with a few replacement units and a few gameplay tweaks (some of which, like the indicator for idle worker units, have appeared in other games but can still be very helpful).I am in the Beta now... it is really like the first one with new features...
There are cool features they added but 1v1 and 2v2 are the same as they use to be... either turtle shell or fast attack...
That being said, I still plan to buy the game and play it often. Having played StarCraft 1 the past two Saturdays, I can easily say that I would still play SC more often if more people still played the original.
Even if StarCraft II doesn't appear to make revolutionary changes to the original's gameplay, I'm okay with that. In fact, given that I wasn't very fond of Dawn of War II's "no base buildings," micro-heavy gameplay, I might even prefer a "StarCraft 2.0" to a major overhaul.