All of the local network stations have digital counterparts (18, 21, 23, 24, 26, 29, 30, 47, 49, 53, 51, 59, 61). Many multicast (18, 21, 24, 30, etc.) You probably know this already.
The only recent changes I have seen is that 47 has added a second non-HD multicast (47.2) that they seem to be testing. For the moment, it's the same programming as 47.1 only with no audio signal.
My antenna is aimed toward the Fresno stations so that's all I can talk about. There may be some new stations towards Bakersfield, but I don't keep up with them because I don't have a rotor needed to tune them in.