Sony has…a lot, from semiconductors to financial instruments. Canon has high-end video, scanners, and enterprise printing and copying. Nikon has photography-oriented cameras, some medical optics, and semiconductor equipment, and that’s about it. They’re just not the sprawling conglomerate that can absorb losses as easily as Sony.
Sigh. I’m a camera nerd, and I hate to see the market shrink further. I know it’s going to—cell phone cameras accomplish the actual job to be done that most people have, which is snapshots of kids and cats. And, interchangeable lens cameras are getting to the point they’re over-serving the high-end market with ever-fancier lenses and marginal sensor improvements, with no real workflow improvements.