If you read the news lately, Blizzard is experimenting with a Game Store. ( this will start in asia )
For those who haven't read the threads, front page news or the blue tracker. A Game Store is a store in-game where you pay real money to get items, Example 100% more experience buff.
But i'm sure blizzard is going to expand that with a 100% Reputation buff aswell.
I read in the blue tracker that blizzard is experimenting with it and listens to the community and i got the feeling like blizzard was feeling that the rest of the player base liked the idea.
So let's see if that's true.
Remember, In Game Cash shop will probably be here when we still have to pay a monthly sub.
My answer will be a NO because we already pay monthly and then you can even buy unfair items that can screw up world firsts and everything.
In my opinion this should never ever come to EU/US it would feel like those asian MMO's then where you can buy all these bullsh!t.
But that's my opinion.