Well, you do get what you pay for with glass and it doesn't go out of fashion (saying that though I feel like lenses made for crop-sensor cameras will start to die out, unless a big tech advancement makes that format popular again).
The dedicated camera brands (except for Sony) are taking a big hit from the popularity of devices like smartphone and tablets.
Point and shoots are essentially dead, as we know it. Their strategy is to go up market, specialized and premium to supplement smart devices.
I think crop lenses will stay very popular for at least a decade because of price.
Hopefully a point & shoot with a medium format image sensor in the spirit of the Sony RX1R II or Leica Q will become available.
Canon & Nikon are in decline and their strategy is to diversify from the camera market.
Fujifilm has a monopoly on retro-looking digital cameras.
Same with Panasonic to an extent.
Sony's raking in the big bucks from selling half the world's supply of image sensors for smart devices.
Quality full frame lenses like the Batis will stay relevant/production for at least 1-2 decades.
So unlike, say, a car I can sell the lens at a near original value down the line.