before Process Monitor (procmon), those features where split between File Monitor and Registry Monitor (filemon and regmon). And they also have tcpmon for network connections, so maybe that why you think that it was already around before.
I'll also add that I am a big fan of Russinovich and his tools (including of course Process Explorer, Autoruns and Pstools like psexec pslist pskill etc..) so if he releases something new, it should be interesting for sure!
