I’m working on something similar (not announced yet).

Tools like Gravity Sketch, and the tool I’m making, are great for conceptualization and communication.

In seconds to minutes you can take an idea from your head and show it to someone else. You can have an idea for a product ready to show your peers and in moments they can offer feedback and make changes.

Tools like this aren’t replacing the final engineering yet, but they’re making the planning and communication stage dramatically more efficient.