Computers allowed the development of ACH, debit cards, and ATMs. They gave us the ability to bank by phone, and by web. But, I think your general point, sans snark, is correct in that I can’t think of any significant, novel banking service that’s been introduced since about the 1970s. (I count ACH as novel, because it enables you to do things you couldn’t do before. Banking at home in your pajamas isn’t any different than waiting until Monday morning and physically going to the bank.)