My whole group(s) use laptops while gaming at this point, and it's generally not a problem.
At this point our privateers party commands six ships (discounting fighters) and close to a hundred crew, so living solely off of dead trees was beginning to become unwieldy.
We store everything online for the most part, so that if someone misses a session we can still access all the particulars on their assets.
As far as angry birds, well... there are times when someone's character isn't present for what's going on, and if they're keeping busy while waiting for the action to return to them, well that's fine I suppose. As long as they're keeping it to themselves- not playing games with the music on, or interrupting others to show everyone 'funny cat picture ###' or worse still... 'funny cat video ###'!
We have long gaming sessions, and we're all friends, so I'm all for socializing- but during dinner breaks, or coffee breaks, or something. Not while the GM is telling me how my pet rabbit was just eaten by a hungry Falar, please. Poor bunny...