There’s something missing from this article. When you sign a receipt, you’re not just providing a sample of your signature for comparison against the one on the card. You are signing a document, usually saying that ‘I agree to comply with the terms of the cardholder agreement’ If this is no longer necessary, the card issuers must have determined that they have other legal agreements which cover purchases, and that th…
This is in fact the only reason for a signature, it does fuck all to identify somebody, even if merchants were to check it, which they never do.
But with the amount of CCTV nowadays, that's probably more reliable than a signature.
Also ironic that anybody would describe PINs as the next step, I can't remember a time before PINs were used. Even EMV contactless payments are pretty common now, and provide benefits to the banks (liability shift/less chance of PIN compromise) and customers (quicker).
It's not a tech problem, it's a cultural one. You don't realise how much less friction, less hassle it can be until you've lived it. From my time in the US, it seems like it isn't exposed to outside ideas that much, maybe due to it's size.