Launching next to the Matisse, the desktop Pinnacle Ridge successor which will feature Zen 2 CPU cores, the Picasso was revealed as a direct successor of the Raven Ridge desktop/notebook APU, which will also be based on Raven Ridge Zen architecture, bring power/performance uplift and fit the same AM4 desktop and FP5 notebook sockets, just like Raven Ridge and the Bristol Ridge before it.
While the listing of Radeon Picasso Graphics in UserBenchmark database under the 15D8 Device ID, spotted by Videocardz.com, does confirm that the APU is indeed incoming, unfortunately, the leak does not provide any other details.
This also means that is still not clear if Picasso will be based on a 14nm manufacturing process with Zen CPU architecture, or use a 12nm process, but it looks like a slightly improved Raven Ridge. It is highly unlikely that it is based on 7nm manufacturing process and the leak does not provide any details on the actual GPU.
Since AMD Picasso APU is scheduled to launch early next year, probably alongside AMD's first Zen 2 based CPUs, there is still a long way to go so more info should leak out eventually.