I agree, having user authenticate and then verify their identity + transactions is coming. I wrote a whitepaper + code demo on this topic. You and your readers might be interested in seeing this in action: Whitepaper and Demo: UX for Authenticated & Verified ERC20 Payments Using MetaMask and EthSigUtil https://steemit.com/ethereum/@emmonspired/whitepaper-and-demo-ux-for-authenticated-and-verified-erc20-payments-using-metamask-and-ethsigutil