Intel plans to launch Raptor Lake-S Refresh K processors in October this year; non-K model processors in the first week of 2024; and Intel Arrow Lake-S processors in late 2024 / early 2025.

The latest news is that Intel has started developing three 800 series chipsets for Arrow Lake-S and Raptor Lake Refresh using the LGA 1851 slot.
The Z890, B860 and H810 will be available for desktops, and the W880 and Q870 chipsets will be available for workstations. While the current list does not include the H870 chipset, it will follow previous trends and may appear in future releases.
Currently, there is not much information about Intel 800 series chipsets, The series chips provide up to 60 HSIO (High Speed Input/Output) channels, including 24 CPU and 34 PCH.
The B860 and H810 platforms offer 44 and 32 HSIO channels respectively. These chipsets will essentially support up to 48GB of DDR-5-6400 modules and ensure compatibility with WiFi 7 and 5GbE.