Whenever I've seen clips of Starcraft / Starcraft 2 played at a high level it looks a lot more like an action game than strategy.
I see a lot of "micro" (or clicking really quickly to move a unit into range to fire but then out of range of the enemy unit's retaliation).
Supreme Commander 2 seems to have moved somewhat in this direction too, most of the online games I have played are on quite small maps.
I guess this is because big scale strategy games just take too long to play and people just don't have the time.
As an extreme example of this , I remember some years ago when I shared a house with some avid gamers who were into Heroes of might and magic. I remember two of them took a week of work and played a single game of HOMM (4 or 5 , can't remember which) for the entire week and still weren't done by then end. Bearing in mind this was playing for around 16 hours a day for 7 days straight. So 112 hours in a single game.
I don't think I've ever seen a finished game of HOMM in my life.