If you are looking for one single overview of SRCMR, look no further, Modular Self-Reconfigurable Robot Systems Challenges and Opportunities for the Future, by Mark Yim, Wei-Min Shen, Behnam Salemi, Daniela Rus, Mark Moll, Hod Lipson, Eric Klavins, Gregory S. Chirikjian, is it!
This is an excellent introduction to the basic concept, as well as to what has been done and what remains to be done. It also introduces you to many of the major institutions and researchers in the field.
What I like most in this paper is the “bucket of stuff” concept.
The endless, and I do mean that literally, possibilities that are offered by being able to assemble even relatively few units of just some basic types into whatever you want at any given time, is easy to underestimate.
I belive that if researchers can present a working, basic set of modules and a development enviroment, many creative people are going to take it from there and assemble absolutely incredible inventions that cannot be foreseen.
And even all those inventions might not be “The Big Thing”, that might instead be the freedom to reassemble your units whenever you want to whatever you want. That freedoom is indeed revolutionary.