Google Drive and a Chromebook is all I need
Curt, thank you for this interesting list, very useful.
I'm just about to travel to Madrid for a few days, and my Chromebook, using my Google account, is all I need now. Well, that and my Sony Android phone.
I still have my trusty Dell XPS laptop at home, which I use when someone send me a complicated Word document with comments. But it is hardly used now.
I have a Google for Work account with my own domain, and I use Drive for everything. Since my work computer, the one I'm using right now, is a ChromeBox, I don't need to worry about synchronizing my documents.
As for Skype, it is the most popular video conferencing service out there, but Google's Hangouts is hard to beat in quality and convinience, as you can use it directly on the web browser without installing anything.
I've been using Chromebooks for the past three years and they are great for conferences, especially since WiFi is available everywhere.
And Chromebooks encrypt all traffic with Google servers, plus you can't get infected because you can't install anything.