Hard to think Gibson could go under, their specialty is massively overpriced guitars, but a big company can't survive an industry that shrinks by 1/3. I'd be stunned if Gibson guitars stop being produced, the brand has way too much value. I own a Gibson SG, but don't have much love for the company, mostly I'm just hoping that they dump their inventory and I can pick up an ES-335 for cheap.
(I'd be happy just to sip wine and stare at it)
I remember playing guitar in bars 10 years ago and thinking "damn, i missed the glory days, I should have learnt to play bleeps and bloops on a laptop instead, stupid punk rock friends leading me astray." It's crazy to think that Screamo was the last form of rock music to really resonate with young people.
Ed Sheeran is probably the closest thing to guitar hero for the kids these days (his solo acoustic performances are shockingly good).