Without the calibration, I don't know why you'd even make this article. I get it if you get paid for it you need to come out with something, but you don't just push something under the rug because of your inability to properly run said "something". This article really should be taken down or heavily emphasized as opinionated.
"Unfortunately, I may have set myself up for disappointment with that attitude. The Leap Motion does indeed track your hands in space, and it certainly shows a glimpse of what AR could look like in the near future, but there's still some work to be done. The technology has potential, but I fear the current iteration isn't quite up to snuff. Accuracy must be improved dramatically before this can be used as a viable complement to consumer virtual reality."
The calibration is made to fix ALL of this. I honestly am very disappointed in this conclusion and how you feel it's due to the technology and not the inability to run the core application that makes the device work properly.