I liked this (older) overview article for more context on DDR6/LPDDR6: https://hothardware.com/news/jedec-ddr6-lpddr6-revealed

Especially:

[…] Where DDR4 memory officially topped out around 4266 MT/s and the fastest LPDDR5X available is around 10 Gbps, LPDDR6 is going to start with a 10.667 Gbps per-pin data rate, and is expected to scale to 14.4 Gbps.

Okay, starting out where we are now might not sound that impressive, but keep in mind that typically a new memory technology actually starts well behind the fastest memory speeds of the current tech. The earliest DDR3 memory supported 800 MT/s transfer rates, while DDR2 memory available for enthusiasts was clocked at 1333 and even 1600. Similarly, when DDR4 debuted it was the sluggish DDR4-1866, while DDR3 had been hitting 2133, 2400, and even higher speeds for some time.