Hmmm. Not true. There are a great many RP-ish type games that have no combat at all.
Will we be able to build cities in the future, manage them(Including Education, Health, Finances, etc.) and RP being a mayor? While having to deal sometimes with all kind of natural disasters like floods, fires, and so?
Will we be able to open business in an economically realist environment, where things like propaganda and management will be necessary to make them grow in Yliakum while trying to beat the competitors?
If no combat/conflict exists, unless it become some kind of "Tycoon" or "Sim" game focused on RP, or something like that, I doubt it would be interesting to play PS just for saying "Hello" and chatting to your character friends using the the chat system. There's another thing for that called IRC.