

Thread is a wireless standard meant to sit next to Bluetooth and WiFi.
Matter is a home automation protocol can that be used over Thread or WiFi. Ideal Matter devices use Thread instead of WiFi because running a bunch of home devices like light bulbs or switches on your WiFi is a recipe for disaster.
Matter is important because it provides native compatibility among different platforms.
Remains to be seen? What other information are you waiting for?
I’ve been using Thread devices for ~5 years now.