I haven't taken a laptop on a cruise for almost 4 years, instead just using my iPad. I caused a bit of a stir on the Elation in 2010 when I used my iPad at one of the bars. The staff had not seen one yet and I was one of the first iPad owners. It worked perfectly and so I have used it ever since as my cruise computer.
I use the iPad camera for photos and post them to this forum, Facebook, Twitter, etc., along with comments. It is really superior to a laptop for those applications, but then I also have a hardshell case that also has a standard keyboard inside that I use for typing so it then becomes more like a laptop for sending e-mails or posting on the internet.