This leads to an opening for either a challenger to Mint that has better relationships with the banks, a bank with a better UI than the existing banks, or a ban

This leads to an opening for either a challenger to Mint that has better relationships with the banks, a bank with a better UI than the existing banks, or a bank that explicitly supports Mint. The existing banks burying their heads in the sand when there is obvious consumer demand makes the area much more ripe for a new entrant. I'm not sure how it will play out, but I would consider switching banks in order to have a better UI on my money. Supporting something like Mint or Personal Capital is basically a requirement for me to put my money in your bank. Note that I'm not even particularly happy with Mint, I just can't imagine not having some form of aggregation of my financial life. I probably check it at least 1-2x a week and have been for 5+ years, it's a critical piece of software for me.