Here is some interesting data on incidence and prevalence of ESRD by quarter in the US by the latest USRDS Quarterly report
It looks like the prevalence of ESRD is not going down and seems to be increasing a little bit, but the incidence of ESRD does appear to be going down, although ever so gradually. One interpretation: we are having success in reducing the incidence of kidney failure but once patients get on dialysis they appear to be living longer. All good news! Of course, another explanation might be that we are starting patients later on dialysis.