They will delay and delay the of port, then the new gen of consoles will be announced and they will port it for them first, then pc will get it like 6 months later. Pretty much what happened with 5 iirc.
I dunno if you want him playing a true mmo at that age, but old school RuneScape is currently as popular as ever. Specifically old school though, RS3 has the same sort of problems with micro transactions etc.