It looks like the first next gen Surface model was already tested back in June, but the results were spotted only recently. According to the Geekbench report, the upcoming Surface is powered by an Intel Ice Lake i5-1035G1 quad-core CPU with Iris Plus iGPU coupled with 8 GB of RAM, and the scores appear to be similar to devices powered by equivalent Ryzen 3 ULV CPUs.
https://www.notebookcheck.net/Microsoft-s-upcoming-Ice-Lake-powered-Surface-device-allegedly-spotted-on-Geekbench.434671.0.html