Which Firm Poses The Biggest Disruptive Threat To Retail Financial Services?

Over the past few months, we've been researching a series of reports about the disruptive potential of various clusters of new entrants into financial services, from social lending and crowdfunding to digital investment managers and digital banks.

But many eBusiness executives are more concerned about the potential impact of technology giants like Amazon, Apple or Google with their deep pockets, technological prowess and broad consumer reach.

I originally posted this question on one of Forrester's internal collaboration platforms, but I was so intrigued by the results from my colleagues I thought I would post the same question here to see whether your perspective similarly is thought-provoking.

Please vote in my poll in the column to the right of this post. ->

Have I missed any firms that you think have even greater potential, or plans, to disrupt retail financial services?

Which of the following firms has the most potential to disrupt retail financial services over the next three to five years?