There are things I don't care for in 4e, but my DM prep time is literally a quarter -- or less -- of the time it once took me to prep 3.5 games.
I never used a laptop at the table until 3e. I had to to keep track of the specifics for the countless NPCs I generated and all their feats, skills, items et along with custom or "classed" monsters or just about anytime someone cast "Summon Monster" or "Polymorph" so we could get solid numbers on the fly.
So with 4e - are we saying now the -players- need the laptops? Heh. There has to be a middle ground. I know, there are plenty of other RPGs that provide that, but I'm a DnD kid.