I think a lot of these new cartridge designs are aimed at (pardon the pun, it was unintentional) the less informed or educated shooter. Not everyone reads reloading books and ballistics tables by the fire with a bourbon on the rocks every night, nor does everyone have a room in their house dedicated to their guns and reloading gear. A lot of guys buy the magazines, read the articles and ads and believe what they see as gospel, fall for the hype and go buy the products. This cartridge is for those guys that want the latest and greatest, want the fastest cartridge out there, the shiny new rifle and scope, so all their buddies will be in awe at hunt camp in the fall. Almost everyone knows this guy, he is every where, at every gun club, in every hunt camp, probably a regular at the local gun shop. He trades guns like the rest of us swap our underwear, and will even give the rifle credit or blame for having made a terrific or a missed shot. He will kill a Boone and Crocket deer, or a 7X7 bull elk and claim the rifle will be his forever, then next year he will shoot one in the guts or miss completely and then the next day trade it in blaming the gun because "it" made the bad shot.
Large companies have to keep bringing out new products on a regular basis to keep sales going. Otherwise they are perceived as not being progressive or innovative, standing still so to speak. The bulk of their sales will be on their bread and butter products, like Partitions and Ballistic Tips etc, but they need something new every few years to stir up some more sales. Good for them, it gives us something to talk about, maybe even buy and play with it for a while, whatever. There are generally spin offs too, X bullets and GMX, Partitions and A Frames, Ballistic Tip and SSTs, the list goes on.