This is great, as it really lowers the barrier of entering Julia.
It also offers a level of exploration (with the in-place results), which is a neat thing for students – I've found that interactive environments generate interesting solutions to otherwise boring problems. I'm currently trying to replace Matlab as the language I use in our university's Probability class and Juno adds to "why use Julia" argument :)
Cool, hopefully it will replace the All Songs Considered audio stream (which is great).
Side note: Is it just me, or this "scroll to reveal stuff in steps" is a bit frustrating? It seems to be used more and more often and I am sometimes puzzled by the fact that I'm missing the scrolling step. I try scrolling and get either too far (which shows half an image coming from above) or don't get anywhere (which makes me scroll more and skip steps).
Here's an example: http://www.spendeeapp.com/
The link in the post redirects to the Google store that only shows a Chromecast. Oh well.