Sadly, if WoW can get away with this and it becomes a success then ARR will probably follow suit since eventually. Despite initial outcries the cash shop is a success.
As other's have said, I don't think this will stop RMT since they could still lower their prices and make money that way and/or sell max leveled accounts.
The good thing about this game is that you don't need gil for many things besides except for housing and relic progression.