What are some of the advantages and disadvantages of mobile payment systems in a) developed countries and b) developing countries?

What are the key factors that differentiate the different mobile payment systems?

Which factors do consumers care most about?

Which factors do merchants care most about?

Are there forces that are likely to encourage one of the mobile payment systems to emerge as dominant? If so, what do you think will determine which becomes dominant? I

s there anything the mobile payment systems could do to increase the likelihood of them becoming dominant?

How do these different mobile systems increase or decrease the power of a) banks, b) credit cards?