Silicon Labs showed off a proof-of-concept / prototype Z-Wave ↔ Matter Bridge prototype (EFR32MG24 + Z-Wave Remote Co-Processor [RCP]) in the video above at CEDIA this month. Zooz also showed off their 800-series prototypes, but no video yet.
Could be this pair; the exact RCP / USB stick is unclear, but this model looks close enough.
SLUSB001A EFR32ZG14 UZB-7 Z-Wave 700 Stick Bridge Module - Silicon Labs (silabs.com)
EFR32MG24 Series 2 Multiprotocol Wireless SoC - Silicon Labs (silabs.com)
If all it needs is a USB stick + the Unify SDK, that’s a small positive sign for we Z-Wave + SmartThings owners as I think our USB port is theoretically alive, but unused. Plus, it’d be an in-place upgrade to Z-Wave 700.
That is, if Samsung had a financial interest in Z-Wave ↔ Matter bridging: I’m leaning towards “no” from their replies now.