Heeey, don't affiliate or compare me with Coreteks!Well It is not Linus Tech Tips, and does not release video every day etc.
What is definitive, it is very intresting rumor or not a crazy rumor from Klingon.
Found this on the ARM TechCon blog: Someone mentioned this to me recently as something related to ARMv9.0-A, possibly the post Hercules big core. Link for the ARM TechCon blog here. A quote under another image: "MatMuil will double CPU GEMM performance" "Matternhorn will introduce what Arm...forums.anandtech.com
My news posting was based directly on Anandtech's coverage of ARM's TechCon 2019 keynote.
No speculation was used in the OP with the exception of the v9.0-A part, given only Matterhorn's codename was stated by ARM, no more.