I think you're right- it might be more comfortable than, say, a race bike, but when I think about what it feels like to have my arms in the air for a length of time (like working on an overhead light fixture or something), I can only imagine what it'd be like trying to ride with a set of those goofy bars for an hour.
I see a few posts now that I know what to search for that it "relieves strain on wrists and arms", but honestly, I think standard riding position (city / adventure / touring bikes) has the most natural and relaxed body position overall, as long as you can adjust it to your body size and proportions.