Kodak comes to mind. They invented digital photography, but their film people deliberately kneecapped their digital people. Killed the company.
I worked for a camera company that made boatloads of cash from point-and-shoot cameras. That entire business was pretty much turned into chum by smartphones. I remember them refusing to even take the iPhone seriously, when it was announced. They took a serious hit, but seem to be recovering.
I have personal experience in the field (27 years), and met and worked with the folks involved, so I know it's good info. I'm not especially interested in hunting around for stuff that basically is a "lite" version of my personal experience.
I worked for a camera company that made boatloads of cash from point-and-shoot cameras. That entire business was pretty much turned into chum by smartphones. I remember them refusing to even take the iPhone seriously, when it was announced. They took a serious hit, but seem to be recovering.