Very much, string theory is simply a work in progress. What we are inching toward every day are predictions that within the realm of current technology we hope to test. It's not like we're working on a theory that is permanently beyond experiment. That would be philosophy.

This quote means that string theory is still a theory that is being developed and is not yet finished. The idea is that as more research is done and more progress is made, we can start looking at making predictions that can be tested using currently available technology. On the other hand, if the predictions cannot be tested and cannot be measured, then it is considered philosophy instead of science.