Great, so now when I'm at Phillies games I don't even have to leave my seat to order a beer. To be honest, I'll probably try this out the next time I'm at a game.
I guess it depends on what you determine successful as being.
Apple cannot be successful at multi-party global services when they only cater to Mac or iPhone consumers and not cross platform.
Take for instance, personal payments with Apple, what use is that if the person I want to pay doesn't have an iPhone? This is a scenario that is the norm outside the US.
"Successful" really only means one thing--did it accomplish the goal Apple had for it? For example, you mistakenly assume that Apple added personal payments to Apple Pay with the goal of having x number of cross platform users. Not their goal at all. Apple Pay itself is designed to two main things: produce profits from services and to enhance the value of the Apple ecosystem to the consumer. It is accomplishing both of those. Personal Payments adds a small amount of profit, but it further enhances the value of Apple Pay and the Apple ecosystem to the consumer. Voila! Success!
Indeed, one of the most interesting questions at play is the interplay of these two goals and to what extent do the increased marginal profits from making a feature cross platform negatively impact the value and profits from the system as a whole, e.g., would more money from Android users using Apple Pay outweigh both the implementation costs and the decreased value of it as an Apple exclusive feature?
"Successful" really only means one thing--did it accomplish the goal Apple had for it? For example, you mistakenly assume that Apple added personal payments to Apple Pay with the goal of having x number of cross platform users.
As a consumer I am well qualified to tell if a services is a success and i'm afraid to say that a service where I can only interact with a small amount of the population cannot be successful. Again, it depends on your definition of success. You are looking at a monetary value, I am looking at a usage perspective.