Which telescope technology advancement created the biggest retail sales surge in amateur astronomy between 2010-2015?

The astronomy retail sector experienced a significant transformation in the early 2010s with a particular telescope technology advancement that changed the consumer market. This innovation made advanced astronomy accessible to average consumers and transformed how retailers marketed these products. Test your knowledge about this pivotal retail trend that democratized stargazing!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Computer-guided 'GoTo' mounts with GPS and automated star finding technology
Dobsonian telescopes with simplified manual tracking systems
Radio telescope kits for home assembly
Smartphone telescope adapters with astrophotography capabilities