FWIW, I'm totally on board with the idea of focusing on the interactive experience, but history has shown it to be very difficult for language environments not based on files to cross the chasm into more common use. (If you don't care about lots of users, then ignore this entire comment! Plus, it's always _possible_ that something will cross over, but we've got decades of people trying...)
Anyhow, I'm really excited to see where you go with this!