The Electronics and Robotics site has already been partially defined by its example questions. Of these, none have been about robotics (excepting a question about program logic in the Lego Mindstorms system, which didn't make mention of "Robotics" as such).
It has also been defined by its comments, which include a focus on duplicating the scope of Chiphacker.
Finally, it has been defined by its subtitle:
Proposed Q&A site for electronics and
robotics hardware hacking enthusiasts
- topics that include robotics, electronics, physical computing, and
even those working with an Arduino.
which only mentions robotics as an application of its scope.
Once the site enters beta, the meta site will be used to further refine the scope and the name. The The 7 Essential Questions of Every Beta include:
Are questions about [subject] on or off topic?
It is clear that some elements of robotics are definitely on topic. Other questions concerning artificial intelligence, philosophy/ethics, and mechanical problems might not be on topic.
What should our domain name be?
This influences not only the domain name, but also the actual name. It would be unlikely that one name would get proposed for the URL, but another would be used as the site name. The answer to this question will probably determine the name.
Interestingly enough, this question has proposed RoboOverflow, and here is another (older) question about a robotics StackExchange site. You are welcome to propose an exchange with a Robotics focus, and I imagine that the contributors to those questions would follow you. However, I think it is clear that Electronics and Robotics should not be renamed to Robotics.