The PlayStation 4 launches on November 15 and could be the last traditional console Sony releases, according to Tekken producer Katsuhiro Harada.
"I think in the future, it'll will be a contest of services instead of hardware," Harada said, noting that he expects cloud services to advance over time.
Sony will roll out its Gaikai-powered cloud service on the PlayStation 4 next year in North America, before releasing the platform on PlayStation 3 and PlayStation Vita later.
"When there's the PS5, it will probably be just a controller and a monitor," Harada added. "Then, the thing that will be left is the name of the service."
Harada is not alone. Sony president of Worldwide Studios Shuhei Yoshida suggested last month that the PlayStation brand is likely to evolve from hardware to a service, though a physical console remains important, at least for now, he said.
"We previously spoke about PlayStation going from hardware to something closer to a service, regardless of the device," Yoshida said at the time. "Of course, PlayStation will still be the center, but I think we would like to expand to different things."