It's how it will get software updates and bug fixes, and might be how the episode guide is updated. Also on-demand stuff.
EPG is not delivered over Internet. Neither are software updates.
Spark FibreMAX using Mikrotik CCR1009-8G-1S-1S+. UAP, UAP AC Pro, UAP AC Pro Mesh, Apple TV 4, Apple TV 4K, iPad Air 1, iPhone 6s, VodaTV Gen 2. If it doesn't move then it's data cabled.
"Does my SKY box or MY SKY HDi/+ need to be connected to the internet?
Yes, your SKY box has to be connected to the internet in order to get access to On Demand content such as TV shows, movies, sports, etc.
This is also dependent on your monthly services.
SKY On Demand offers you a huge selection of titles to download and watch, at no extra cost to your monthly subscription. Any shows or movies you choose to watch will be downloaded via your home internet connection and saved under planner on your SKY box."
Looks like it is mainly just for On Demand streaming.
answer is no it doesnt need to be
It does not need to be connected to the internet to watch live TV or to get the EPG, remote record etc.
You do need to be connected if you want On demand or access to box office (via remote).
gehenna: I did wonder about the EPG part but figured software updates would be over the internet for sure. Interesting
Always been the case, the older ones were OTA updates and did not necessarily need a phone line.