I like new stuff as much the next person does, but I don't spend a lot of time worrying about getting it or about having "what everyone else has". So, I don't mean to seem self-righteous, but we ALL don't "want what we do not have and yet not be happy with what we do have."
I'm absolutely happy with what I do have; and "what I have" that's most important to me is my children and other family members and friends. For now (knock on wood) I have my health. I enjoy whatever "stuff" I have, though. In fact, I like whatever stuff I have enough that I'm in no particular hurry to replace it.
A lot of (most) of the people in my life are similar to me when it comes to whether they're materialistic, shallow, and "throw-away" people; so the corner of society that I see still values what's truly most important. Having said that, I don't think that enjoying buying something new when one can means that deeper values have been lost or compromised.