Uh, yes, I do. I'm in fact capable of talking about two different technologies in the same post.
Yes, Windows boxes can wake on lan but in your case it sounds like the other computer is doing the waking. That's not the same as Bonjour Sleep Proxy, where the router continues to advertise the service via mDNS even though the machine that was offering that service has gone to sleep. Your "favorites" are completely different from Bonjour-advertised services. And my question remains about whether this means the end of NAT-PMP in favor of uPNP or not.
Airplay, mentioned by other responders, is another technology which I leverage strongly in the house and forgot to mention. I have Airport Extremes (which I have to use an ancient Netbook running XP in order to run a version of the #$%@! configuration utility that will work with them — hate you for that, Apple) plugged into powered speaker systems in several places in the house. When they eventually die, what will I replace them with? An old laptop running Airfoil Satellite???