For me... It's somewhere between Yes and Somewhat.
I see people with TLW, and I couldn't give 2 pinches of shit in a puddle of piss because I don't PvP.
I saw people with Jotünn (in PvE) , and I was like "Dayum, that looks like fun".
I also see people with Geomags (which I still don't have), and I want them... Not because it's a case of "I want what they have simply because they have it", but because I want to play with the Exotic that makes the new Warlock Subclass the best it can be... To experience how it may or may not change the game experience for [u]me[/u].
I also still need Shards of Galnor, but I'm not so worried anymore because they've been nerfed even before I've had a chance to experience them.
I guess it comes down to identifying something that makes the game [i]more[/i] exciting for [b]you[/b], and sometimes, through seeing someone else using it, it helps you to appreciate it more... Or not... Depending on what you find interesting or exciting in the game.