More than the ISA, its the memory interconnect that require standardization. At SoC level, ARM is already a de-facto standard (ACE-Lite, CHI, ...), but its only a standard for communication inside a chip, to interconnect varius IPs.
I guess this standard aim to keep being a standard interconnect even in multi-chiplets system, to create/extend the whole ecosystem around ARM partners.
I guess this standard aim to keep being a standard interconnect even in multi-chiplets system, to create/extend the whole ecosystem around ARM partners.