OmiseGo is definitely something to be on the look out for.
It's up ~40% in the last 24 hours - and I still think it has steam to move up to $3 before this run ends since that puts it at a ~$300 million market cap - which seems about right for comparable payment processors.
They've already got contracts with McDonalds in SE Asia, which is a prime market for this type of tech - so I'm certainly bullish on their longterm prospects as well.
Thanks for the really insightful post - followed and up-voted!