Motherboard makers Biostar and ASrock has just confirmed that upcoming Intel Rocket Lake-S desktop processors will support old Z490 motherboards. The new Z590 motherboards will be announced in January at CES 2021.
From momomo_us:
ASRock Z490/W480/H470 mobo
Supports 10th Gen Intel Core Processors and 11th Gen Intel Core Processors (LGA1200)*
*Updated BIOS is required for compatibility. pic.twitter.com/XDYhJikWB5— 188号 (@momomo_us) December 26, 2020