However, with the recent stories of Ookbee and Stock Radars, or even how Uber becoming a real threat to Taxis, I'm sure the demand is only growing larger and larger, even more so now that prepaid cards are really easy to get (you can buy one at 7-11). If the payment experience is good enough that it increase sales, people might eventually quit bothering about the fees. So to me, the missing link right now seems to be a payment gateway.
I have been working with Omise under contract for a while (I'm omise-python[1] maintainer). I'm not sure to what extent I'm allowed to speak about the plans, so I can't really answer your question (sorry). In my opinion, I'm really glad that Omise is tackling the payment gateway problem. Especially how nearly all other players in Thailand require redirection to their payment page to accept payment (some even require successful redirect back to merchant's callback url to finish a transaction) having someone who say "you hate that redirect? we too!" is really reassuring.
It's a lot of f*cking around to get a merchant account in Australia too - it's only because of newer payment providers like Stripe and Pin (AU only) who don't require a merchant account, that it's feasible for a small bootstrapped company to consider accepting credit card payments in Australia.
Here in Thailand it seems there is much less demand for online services, so there has been much less pressure/incentive for innovation in the payments space.
Omise are a reasonably new player (similar concept to Stripe or Pin), and seem to be tackling this gap in the market, however I'm not sure how fast they're taking off. I'm still waiting for USD support (I want to be able to charge foreign clients in a known currency) but no specific word yet on when it will be available.