ability to work "off line"
Strange as it may seem, I go offline. There are places where there is no wifi connection or it is intermittent. I go to these places (ok, sometimes I'm traveling through them). My best processing is done off line and it enables a 50,000 ft review. I vote for off-line. I don't know if this requires a desktop application (don't think so). Maybe just a sync once returned to on-line.
This is now completed. GTDNext works in offline mode.