The AMD Ryzen sounds really good. 8 core 16 thread 20mb cache and turbo to 4Ghz stock speed. it easily beats intel equivalents which are A LOT MORE EXPENSIVE were talking $1,000+ but for the 1800x only like $400. Also it uses less power than its competing rival equivalents. Downsides you need a new motherboard. Think of it as double the performance of an i7 6700k. The i7 6700k is the fastest 6th gen intel processor though.
A few things, if you are comparing to the enthusiast chips which is correct in it should be then you will likely need a new board on the Intel side also as most will be on the 1150/1151 board.
Only 1 core turbos to 4GHz whilst in stock for the 1800X not all 8 cores. So there is that.
It matches the performance of the $1000 chip not easily beats it. It looses out still in some cases and is above in others.
If you then compare to the 6700K & 7700K it again does indeed have double the performance in certain places. In general gaming (for 95%) it still looses out to both Intel chips. What it should do though is offer 90-95% the same performance in real world gaming situations.
It wont magically make it much better for gaming unless the game is really good at utilising all the cores/threads to complete certain tasks. Then it is noticeable. The reason that it works on BF1 so well is because online multiplayer requires a lot of CPU overhead to work well. One anomaly to this is F1 (the racing game) which works much better on Ryzen but I really can't see why.
Further to that though, it still requires a lot of work from developers to utilise what AMD are providing us with Ryzen. Let's hope the Cobra engine is adjusted to really utilise the cores available. At the moment it doesn't appear to be because even the Intel Enthusiast chips struggle and where Ryzen does do well those Intel chips still beat them in gaming performance.
It is not a magic answer to the problem you have with getting high FPS in Planet Coaster. It will likely run smoother and have more consistent frames though because all cores are not tapping out at 100% all the time. With that this game would look better running at 20fps constant than it would running at 60fps with big spikes in the low fps zone touching the same 20fps for a few seconds because that is what makes games feel choppy and loose fluidity. We notice naturally more that there is a large spike in FPS than we would a consistently smooth game.
Note: Yes games at a constant 60fps would be smoother where possible and that is not what the statement above means so before anyone jumps at that just have a think about what is being said or take it this way, if a game runs at a constant 60fps then that's great, for people who have 144Mhz monitors and so would like 144fps they will notice the same issue of dropping to 60fps at times as the above example.
Furthermore it is the reason we have now got G-Sync and Freesync to try and alleviate some of these issues.