In my opinion, physiotherapy research will shift from RCT's to more advanced observational trials. If you look at the latest cochrane handbook (Cochrane Handbook for Systematic Reviews of Interventions) you will see the implementation of the GRADE approach to evaluate the body of evidence.
According to this approach a properly executed randomized trial is rated qualitatively as high as a double-upgraded observational study. Moreover, the upcoming use of computers by physiotherapists will result in the increase use of outcome measures and finally faclitate research projects in the actual physiotherapist's environment.