Ryan told the official PlayStation Blog: "We're not yet in a position to disclose our plans for the future of PlayStation Plus, but there will definitely be a prominent role for it in the PlayStation 4 landscape."
The service currently offers up 65 games a year for download, along with money-saving discounts, exclusive demos and trials, online backup, and automatic software updates. It costs £12 for 90 days, or £40 for a year.
So how could it work for the PS4? Sony has already said it wants to make every PS4 title available in a digital format, so it could well do so using PlayStation Plus. In the same interview, Ryan said the PS3 would probably be retired after fewer years than the PS2 -- which is still being sold in the Middle East seven years after the PS3 was introduced -- so we could see PS3 titles offered up via PlayStation Plus too. The PS4 will stream PS1, PS2 and PS3 games online, but how that'll work alongside PlayStation Plus, we'll have to wait and see.
The PS3 isn't going anywhere just yet though. Ryan added that the console will continue to be "a very important part of our portfolio, certainly in 2013, 2014, and probably beyond that."
The PS4 is due to be released towards the end of the year, though Sony still hasn't worked out how it'll look. Time is ticking, chaps. Arch-rival Microsoft is said to be ready to unveil its Xbox 720 in April, ahead of E3 in June.
Are you excited about the PS4? What features would you like to see? Let me know in the comments, or on Facebook.