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Vinyl is both a physical and analogue format, superior to digital in both respects, and that's why it'll survive CD, SACD, or any other digital format.  Vinyl never went away, it was only discarded by those who must have the latest plaything (a lot of those people are now regretting it and returning to real Analogue audio on Vinyl) - so Vinyl lives on - and it is now picking up pace yet again.

The sales and model releases of brand new Turntables are on the up, and the sheer amount of weekly new releases on Vinyl is further proof of the trend.  On the DJ scene, some venues (usually the the really classy ones) won't let you anywhere near the 'buseness end' of their venue unless you use real Vinyl.

Last but not least, Vinyl is sooooooooo much cooler than a digital rig as is demonstrated in the attached photo..  But yup, Vinyl is far superior to any CD out there, and those that can't tell or think it's the other way around, really should invest in better quality audio gear.

I don't think vinyl will not catch on beyond the afficiando and hobbyist groups due to the portability of the digital formats. Vinyl requires storage space; with many storefronts closed due to digital downloading and CDs, you'll only find vinyl in specialty shops which are out of the way and out of the reach of the masses. DJs may use vinyl in their mixing at home, but they won't go to any clubs with it, because most of the larger clubs don't have vinyl mixers, they have CD turntables. It's doubtful those clubs you describe have on Vinyl turntables, because you only have to think about guest DJs showing up with boxes of albums instead of a binder of CDs (and the better ones have their macbooks loaded with DJ software) to see that argument doesn't make sense.

Several of my friends are club DJs and attend the various music conferences and no one is carrying boxes of vinyl albums with them, but they certainly have their CD binders with them ready in case they're asked to hit the turntables.