The upside is that it's a desperately needed solution to funding journalism. Hopefully people can pay per article, making quality journalism better funded and far more available (many people who can afford one article can't afford a year subscription, I assume).
But the cost is far too high: Google knows everything you read, and becomes the gatekeeper for journalism. Yikes. For those not worried, imagine the day when Google ownership/management shifts from the current well-intentioned people to someone else. That day will come.