I wouldn't want my players to have laptops at the table, because I want them to focus on the story we're all telling together.
I've got lots of nifty tools to make the game easier, but I don't use my laptop during the session yet, because, well, because my husband hogs it all the time so I haven't been able to get all my stuff loaded and configured, darn him! All my stuff in on the desktop machine, which isn't exactly portable.
But one of these days, it will get done. Carrying a laptop to a game session sounds far easier to me than lugging all the books and junk I have to carry now.