I’ve personally been looking forward to this for a while. No details beyond the launch specs just yet, but hopefully it won’t be long to wait now. If the 5700 is a bit beyond reach, this may be just the card for you.
The only thing that concerns me is that these cards may be a bit too far down in performance to be an upgrade for the RX580. We’ll have to wait for benchmarks to see how it compares.
https://www.anandtech.com/show/14949/amd-announces-radeon-rx-5500-series-for-desktop-and-mobile