What industries will collapse when all the bommers die?

I had a thought today when a Viking cruise commercial came on (for those who don't know, Viking operates river cruises specifically for seniors).

What industries do you think will collapse when all the boomers who have hoarded their wealth die off?

I could see the cruise industry being in big trouble. I know it's not only seniors who take cruises but from the few I've been on, they seem to be a majority (aside from Disney). Plus these things are gas-guzzling monsters and they can only discount tickets so much before it doesn't become profitable.

Tourism in general may take a major hit if the middle class is destroyed. Sure, people will still travel, but less frequently.

The housing market is an obvious one. Every boomer I know brags about how they bought a 4-bedroom house for 8 pence in the 50-60's and now it's worth 1.2 m.

Not that any of them will care because it's all about 'me me me'.

Just curious what others think. What industries won't exist in 20-30 years when all the boomers are gone?