AMD's upcoming Van Gogh APU with a Zen 2 CPU and RDNA2 iGPU will likely be positioned as a viable alternative to Tiger Lake-UP4 while offering support for LPDDR5 memory. Van Gogh could make for good test bed for AMD to test out RDNA2 iGPU implementation for upcoming APUs including Dragon Crest, Rembrandt, and probably even Raphael.
https://www.notebookcheck.net/AMD-Van-Gogh-to-take-on-Intel-Tiger-Lake-UP4-RDNA2-iGPU-implementation-could-be-a-perfect-test-bed-for-upcoming-Dragon-Crest-Rembrandt-and-Raphael-APUs.532571.0.html