It has been confirmed by the Tekken series director Katsuhiro Harada that development on Tekken 7 has already started. The game will use Unreal Engine 4, and is expected to release on multiple platforms.
Your PC will need a graphics card thats as powerful as a GeForce GTX 1060/Radeon RX 480 Asus 8GB and it should be paired with either a FX-8370/Core i5-4690 3.5GHz CPU to match the Tekken 7 recommended system specs. This PC setup will deliver 60 Frames Per Second on High graphics settings on 1080p monitor resolution. Tekken 7 needs a Radeon R7 370 graphics card to play on low settings, with a Core i3-4160 3.6GHz or Phenom II X4 965 processor to reach the minimum specs, achieving 30FPS on 1080p monitor res. You should also have 6 GB system memory for min specs. Your graphics card will need to be capable of running DirectX 11. To summarise, Tekken 7 needs around a 3 year old PC to play at recommended settings.