Not a chance. You're not going to see next-gen consoles until at least 2020. They'll do the same strategy that they've been doing for their consoles. PS event where PS5 gets revealed in Feb 2020, game/system showcase at E3 and finally release in late 2020.
The reasons for that, even excluding how well PS4 is doing right now, are mostly down to hardware. They simply cannot make a system during that time that will not only provide a significant jump over the PS4 (in terms of everything i.e RAM, storage, GPU, CPU etc) without charging premium price for it, and absolutely nothing suggests that Sony will be taking that route since it's done them so well this generation. As for MS, I hope they take the Sony route in terms of pricing, obviously the Xbox One X is an exception and the original Xbox One was priced higher than competition because of their focus on multimedia and inclusion of Kinect. Hopefully their next base console will be a competent one.
AMD just had their CPU roadmap leaked a few days ago and it mostly confirmed everyone's suspicions, Zen APUs starting in early 2018, one revision of the same architecture somewhere around 2019 and Zen 2 APUs in late 2019/2020. The longer they wait the better, especially since the mid-gen refreshes mitigated the long console gens that everyone hates, now they can relax and think their strategy through.
