It's impossible to say exactly how our ancestors would react to modern technology, as they lived in a completely different time and culture. However, we can make some generalizations by looking at current research into how people interact with technology.
Research suggests that our ancestors might be initially puzzled by the sheer abundance of technology available today, particularly technology that can assist in completing everyday tasks. To them, having access to the internet, satellite navigation systems and computers would seem like science fiction.
Despite any initial confusion, they would likely be fascinated by the sheer capabilities of modern technology and the wide range of new possibilities it opens up. They may find it difficult to understand how today's technology works, but it's likely that they would come to appreciate how it can make life easier and more enjoyable - for example, by helping with communication and connecting people with like-minded ideas.
Modern technology also has the potential to open up new windows into their past - for example, through genealogy websites and records, recipes, stories and photos posted online, and virtual or 3D re-creations of archaeological sites. Our ancestors could explore the places and topics that were of interest to them, and in a way, have a deeper and more meaningful understanding of their past.
Ultimately, while our ancestors may have been initially bewildered by modern technology, they would likely find comfort in exploring the new ways it can enrich and expand their understanding of the world.