Does it exist? Pellet cartridges loaded into a magazine

There have been a couple in the past. One was a bolt action the other was breech loader and had the lines of a Sharps rifle.

 
Doesn't sound cheap per shot. So it's like a PB cartridge but it's projectile and compressed gas container in one unit? I would think it would just pop the projectile out.
I was at EBR a year ago or 3, don’t recall if it was ‘19 or ‘21, but anyway, Rosi (American Airgunner) said that this was “coming”

Didn’t really elaborate. The question regarding gov regulations and advancements of the industry, such as Semi & Full auto AGs was being addressed, & he mentioned cartridges as something that was coming in the “near” future.