In reality, most of these "features" aren't very noticeable to the average gamer. In the case where it is a noticeable, a little screen tearing really isn't a huge deal (not to mention G-sync requires an Nvidia GPU, which not everyone has nor will have).
Avid gamers do have a habit of going overboard on things, such as buying 64GB+ of RAM even though they never use it (and wont unless they run VM's, or huge services/server software, etc...).
It's easy to spend $2,000-$4,000+ on a super high end gaming rig, but in reality the $1,000 rig will game just fine for a long while before mandating upgrades.
