Those are nothing new NECSEL has been around for a long time. It evolved from the old Novalux technology The old Diodes show up on Ebay from time to time. But the output is crap They are designed as a light source rather than a laser. they emit 2 wide bars of light at once.
That Have IIRC 20 emitters 2 rows of 10 and most of the ebay ones have dead emitters. Here is a video if one of the 615nm ones by the member here Lazeerer.