Except that the Line Mothership has been around since 2001ish (not sure exact year, but definitely prior to the 02/03 season... and yes current generation is different than the original, but the point is, it's been around longer than most indie brands have even existed).
I wouldn't be so quick to discredit the major manufacturers and claim they are "chasing the indies". A few of the majors were really the first ones to introduce the newer concepts and technologies we are seeing in fatter skis today. What was the first +100 waisted ski manufactured (which yes were considered fat back in the introduction)... the Rossi Axiom maybe at 110? Followed by lots of 90+ skis (Nordica w105, Pocket Rockets, Rossi XXX, Mothership... all skis introduced 2002 or prior). With the exception of Line (indie at the time) and Igneous, I can't think of an independent brand that even existed before 2003... it wasn't until the majors started making fat-waisted skis popular that indies even started forming. Although indies jumped on the idea of rocker more ferverently than the majors, I would also credit the majors with introducing the concept of rocker. To my knowledge, Volant was the first to develop a rockered ski (2000 maybe?), K2 eventually followed with the Pontoon, as did DPS and Praxis... but I would also say Praxis pretty much just mimicked the Spatula with its first designs, there wasn't really radical new concept or technology there, and I'm pretty sure DPS introduced rocker after the Pontoon was already introduced. I'm not trying to discredit independent companies because I do think they are very important in reminding the major manufacturers that there is a market for niche skis. But I think it is fairly inaccurate to say the major manufacturers are chasing the indies from a design and technology standpoint.