In fact, in places like Europe following the Crisis, we can observe trends in banks' lending and funding, which might be described as back to retail. Nevertheless, I cannot buy the idea that banks should be dull, boring, and far removed from innovation. Such a view seems too extreme and ignores, among other things, the extensive information gathering ability of banks.
If banks distance themselves from cutting-edge innovations, that could affect their business models. For example, if retail deposits begin to move around more frequently due to FinTech, intermediary services performed by banks, for which funding is reliant on relatively sticky deposits, would be forced to change.