I'd argue ryzen isn't 'ideally' suited to 144htz screens .
Even overclocked , on current AAA titles you'll be sitting around the 90-100fps mark.
For me , I've with 10tacle on this one .
I'll take the higher resolution every time , there are some good 1440p 75htz screens about which are are a great in between compromise IMO.
A ryzen 5, 1070 & 1440p 75htz is to me an absolutely ideal pairing.
The ultrawides ??
Personally I love the UWS format, play dirt rally, dirt 4 , project cars etc in ultra wide & its a totally immersive experience , the extra viewing area at he sides is incredible, vice versa fps games, titanfall 2 works amazingly in uws, BF1 is absolutely stunning
The issues
1. Not every game supports ultra wide natively .most new titles do to some standard or another , some better than others.
Manual fixes are possible for the majority of other older titles.
2. Resolution , 2 resolutions available
2560 x 1080
3440 x 1440
A 1070 is going to struggle a little at 3440 x 1440 at the end of the day , you'll be lowering settings on the majority of newer titles to max out a 60-75mhz refresh rate.
If you go 2560 x 1080 you will have no issue whatsoever , it'll crush games at that resolution.
3. Monitor size
A 25 inch uws has the same vertical height as a 20.5 inch 16:9 monitor
A 29 inch uws has the same vertical height as a 24 inch 16:9 monitor.
You absolutely do not want a uws smaller than 29 inch & that's a lot of desk space required.
https://www.youtube.com/channel/UCxfsK33BWlxHgglWl9LTAYA
WAF on YouTube covers jut about everything on ultawide gaming & has reviews on 100's of games based entirely on the ultra wide aspect of the games.