Phone
"While Italian innovator Antonio Meucci is credited with inventing the first basic phone in 1849, and Frenchman Charles Bourseul devised a phone in 1854, Alexander Graham Bell won the first U.S. patent for the device in 1876." (source: elon.edu) This was the first invention of the telephone; however, smartphones, which we classify as digital technology now, were first created in 1992. Businessinsider.com has more information on the first smartphones.
Computer
In 1936, Alan Turing presented the idea for the Turing machine, basically computing anything that was computable - the concept of the modern computer was based off of his ideas. Over the years until 1969, when the first UNIX operating system was produced, a number of different aspects of the computer were developed. A notable development in 1953 was that Grace Hopper created the first programming language, known as COBOL. More information on livescience.com about the history of the computer.
Television
Televisions have a history which is longer than most items on this list. Radio and analog televisions came out even before the 1950s, but digital television is a much more modern development. Early broadcasting experiments began pre-1940s, and World War II influenced the production of television as well. Cable TV began to be used in the 1950s, and saw significant development in the years beyond (source: library.duke.edu).
Smart Home
According to blog.bbcresearch.com, inventors had ideas for home automation technologies, but the idea didn't materialize until 1966, when the Echo IV, the first smart automation system, was developed. Certain home appliances, while not considered "smart", were created prior to that time (early 1900s), including the vacuum cleaner and the washing machine. The popularity and accessibility of smart home systems rapidly increased in the 2000s.
Virtual Reality
In the 19th century, according to vrs.org, painters introduced the concept of virtual reality in panoramic paintings, which attempted to cover the full scope of a situation with a 360 degree depiction. In the 1950s, Morton Heilig created the Sensorama, which utilized all the senses to created a virtual experience in a film. This technology gradually became more advanced and digital, and evolved into what it is today.