We're talking new vinyl sales, so let's put aside the obvious benefits of owning a turntable if you already have a significant vinyl collection.
I personally believe uncompressed digital formats, starting with Redbook CD, have a greater POTENTIAL in terms of functionality as well as fidelity than vinyl. Unfortunately, this potential has been unfulfilled as the vast majority of digital releases fail to live up to this potential by a fair margin due to poor mastering. The loudness wars has dumbed down the format to such an extent that one of its primary advantages over vinyl - dynamic range - has all but been nullified. The mastering engineers have decided that you and your playback devices are too stupid to set the volume to your liking so they've made the decision for you - typically 11 out of 10.
Ironically, most vinyl releases sound better than their digital counterparts simply because their volume hasn't been jacked to ridiculous levels at the mastering stage.