As a coder i can do mostly the same with jQuery or any other animation framework and have at the end maybe some code i can extend or reuse in the finished product. Also from the example code it looks like it needs still a fair amount of time do get something ready (much code).
As a designer you have to learn code and have to learn this framework to work mostly non visual inside a code editor.
So what is the target audience for this tool?
Our designers - who know enough code to make use of this tool - can prototype interactions from their designs without asking a developer to help them. They are an audience for this.
Are we really going to have another "why do we need this automation tool when we can do this by hand?" conversation yet again on Hacker News?
In other words, designers favor tools that let them prototype a high volume of designs in a short period of time. Framer lets me work faster than jQuery, and at a higher quality than tools like Axure, Fireworks, OmniGraffle, etc.
Dropbox Carousel Onboarding: http://examples.framerjs.com/#Carousel%20-%20Onboarding.fram...
Google Now: http://examples.framerjs.com/#Google%20Now%20-%20Overview.fr...
Edit: It looks like Mac OS X is rejecting the apps signature. I was able to open the program by going into Package Contents, modifying the executable to remove the signature and then manually allowing it to open despite the warning about opening apps from unidentified developers.
... This is one of my pet peeves as I'm almost sure it'll work on Chrome.
By targeting only one browser, for no good reason, we're (we being engineers/developers) going to end up with the IE 6 situation all over again. Standards are our friends, not enemies.
Looks great btw, I am looking forward to play with it at work today.