The nature of the beast has changed quite a bit, but there is and will continue to be a need for electronics repair. Take a look at all the services now being offered to replace smartphone and ipod screens. In addition, consider that you still have multiple industries that still rely heavily on electronics. Hospitals need people who can repair expensive diagnostic equipment, businesses still rely on vendors to fix broken copiers, every company has an IT desktop services team that can do basic PC troubleshooting and fixing, casinos will always need someone familiar with electronics to keep slot machines running, and the list could go on.
Now, the days of having your TV fixed have pretty much passed and many electronic items today are of modular design where if a component goes kaput you just plug and replace, but you'd be surprised at how many people still pay good money for that to be done by someone else due to ignorance of how things work.