So, Apple Pay have just launched in Japan. Interesting thing is that is supports the Suica card, which (and I am sure people will) correct me if I am wrong, is very similar to the Octopus card in terms of the technology it uses. Something called FeliCa NFC, or something like that.
Apple Pay is live in Japan and works on public transport | The Verge
I am aware that Octopus has its own mobile nfc sim, but it only works with a narrow band of phones. Now only if Octopus got their sh*t together and worked with the likes of Apple, Samsung, Google, etc.
But then again, I'm sure most people will just say, why bother, we already have the Octopus card?