They cover that at the end of the review. It's basically the score of the system as it is today. It's a fair way to judge something that people will consider purchasing and wanting to have fun with right away. I wouldn't want to buy a console only to hope I have fun with it in 2 years (buy it in 2 years instead). [1]
"But the PlayStation 4's focus on gaming — and only gaming — is undermined by a distinct lack of compelling software. That failing is sure to improve — better games and more of them will appear on the PlayStation 4 — but right now, this is a game console without a game to recommend it. Early adopters of the PS4 this fall are buying potential energy. We're just waiting for a place to spend it."