Given that they can't sell these LTE-U devices in Europe/Japan anyway (where rules mandate "listen before talk" like the article says and where vendors have a d

Given that they can't sell these LTE-U devices in Europe/Japan anyway (where rules mandate "listen before talk" like the article says and where vendors have a different standard called LAA), what's the upside in having this just for the US and places like India when experience indicates most manufacturers would rather make one model that they could sell worldwide if feasible? (e.g. almost all GSM phones are quad-band these days and work around the world)