On one of the slides during the developer's presentation, it states that the elusive game will be built on "current and next generation technology". Now, you'll need to take this with a bucket of salt, as it's a bit of a stretch, but this has spawned speculation that Cyberpunk 2077 will be a cross-generation title - that is, a PS4 and PS5 game.
Of course, this could mean a whole host of things. "Next generation technology" might not mean platforms, it could be referring to development tools, middleware, or any number of behind-the-scenes tech that we're not privy to. There is a small chance this could mean we see Cyberpunk on PS5, but one, indirect quote like this isn't nearly enough to go on.
Cyberpunk 2077 is said to be appearing at E3 2018 in a few months, so perhaps we'll hear some clarification then.