There are a number of successors to the human genome projects, which to various degrees of success have mapped the epigenetic landscape around protein coding genes.
However, your point is pretty spot on: what's the medical value? Having really high resolution epigetic maps doesn't translate into better clinal results, and it's not even clear that the results of these studies are looking at anything but statistically confirmed artifacts!
The HGP definitely had value, but almost all of the "massive" data collection projects in biology have since been basically useless, except for the consortia who got paid to do this. Leave medicine, no one I know of even uses any of these datasets even for research if at all they're made available in a browsable format.
Only exceptions I've seen are the cancer cell line encyclopaedia from broad and the c. Elegans rnai projects.
However, your point is pretty spot on: what's the medical value? Having really high resolution epigetic maps doesn't translate into better clinal results, and it's not even clear that the results of these studies are looking at anything but statistically confirmed artifacts!