I'm really happy with what they've done in SR4, in which Matrix actions can be rolled quickly enough to be integrated into a firefight. I GMed SR2 back in college, when hacking anything significant meant taking the decker's player into another room for an hour while the rest of the team ordered pizza.
GODS YES.One night,
just once, I managed to run a game in both the matrix, and in meatspace, at the same time .... in full parallel. On the one hand, I had to gloss over some of the matrix stuff (didn't give it as rich a description as I'd've liked, to save time; said "eh, close enough" if the player made especially-good rolls, etc).
And on the other hand?
mind-meltingly exhausting. All night, I literally didn't have three seconds' time in which to catch my breath. I had to just run headlong through the scenario.
I'll grant you, my players waxed effusive with their praise. But ... it still was not worth ever, EVER making another attempt.
But in SR4 ...? EASY AS CAKE.