I realize that this is a joke,.
Still, it sounds like a good near-future design. A reflector 1 inch wider than the BLF GT, and using 8 high capacity batteries.
An even better one could be called the Petathrower (8 inch reflector, 12 x 21700). Peta has nothing to do with PETA;Peta is 1000 times Tera.
A tube with 4*21700 placed in parallel would be uncomfortable to hold unless the user has very big hands.
I think that's why we have people fantasizing about it, but no manufacturer doing any announcement.
Would work with a handle though.
But 7*18650 with a handle would be better....