The monero POW v7 changes started at block 1546000 and we are at 1546024 now so that already happened.  I don't know about any monero-wanna-be coins that may have forked off at that point or may be forking off later. 

I hope we see some difficulty adjustment before 1546144, this is pretty slow...  So far though the difficulty hasn't really budged.  In fact it has actually crept upwards a bit which is not helping.