I have now stopped dragging along a laptop to client meetings. The thing is (relatively) heavy, requires a bag, and being the guy with the lap top in a meeting always put you in an inferior social position somehow. The PowerPoint for iPad app has improved a lot. You no longer have to go through the tedious process of downloading a file from Dropbox, remembering your 365 password, uploading the file to the 365 cloud drive, and downloading the file again. Still potential font rendering issues (even with standard fonts that might drop to the next line), still makes me use the combination of PDF files and iBooks. It renders nicely and the iBooks folder/collection solution is good enough to keep things organised. A lighting-to-ancient-VGA-projector convertor enables you to present on a big screen.