Those stating he will utterly transform the way goalkeeping is played are overstating things a little. In the nicest possible way, he’s a freak. In 160 years or so of organised football I doubt there’s been more than a handful of players who can perform both a goalkeeping and an outfield role with such dexterity. The principal constraint that will be made on that claim is the limit that other goalkeepers’ passing (range and quality) will place on their ability to emulate Eddy.
Since the backpass law was introduced around a quarter of a century ago, ‘keepers have got better with their feet by necessity, but it hasn’t precipated a glut of goalies who are sublime passers, quite simply because the requisite talent isn’t there. If it was, it would have manifested itself, for reasons of its obvious advantage to their teams, without any discernible drawbacks. I simply can’t see any disadvantage to a ‘keeper being good with his feet in the modern game. As such, if that passing ability was present among ‘keepers over the last 25 years, then it would have revealed itself and we wouldn’t be remarking so effusively about Ederson.
He is an abnormal talent and as such efforts to fully replicate his game are almost certainly bound to fail. The advantage this will give us over the next few years cannot be overstated.