Just to clarify, Mindstorms has had many iterations. I believe what you're referring to is Mindstorms 1.0 (RCX). It's had three successors in the past 20 years or so - NXT, EV3, and most recently, RIS.
The most recent iteration is based on SPIKE Prime. It's the same hub, but with slightly different firmware. The motors are and sensors are the same but in different colors.
All Mindstorms iterations (including the most recent) are untethered. As is SPIKE Prime.
Essentially this announcement is that they are discontinuing the consumer-facing branding, but continuing with the education product, SPIKE Prime. Both products are actually identical, minus a few firmware differences. The number of motors and sensors included in the box also differed.
The most recent iteration is based on SPIKE Prime. It's the same hub, but with slightly different firmware. The motors are and sensors are the same but in different colors.
All Mindstorms iterations (including the most recent) are untethered. As is SPIKE Prime.
Essentially this announcement is that they are discontinuing the consumer-facing branding, but continuing with the education product, SPIKE Prime. Both products are actually identical, minus a few firmware differences. The number of motors and sensors included in the box also differed.