EFB's certainly make the cockpit tidy compaired to having all those charts everywhere. That is until you can't find what you are looking for so get the charts out anyway. 'Tis an interesting tool for long flights, if just to relieve the boredom a little. There is only so much "patience" you can play though!
The argument re ipad reminds me of the Americans spending millions, (billions?) and many years, developing a pen that would write in space, in all dimensions.
The Russians took a pencil!