It was good to hear that Sunrise is increasing the download speed to 2.5 GBits, but unfortunately unless everyone has a desktop or laptop that can handle that download speed then it will make no difference at all.
The Ethernet Controller card and Wifi controller card determine how much data can be downloaded on each persons devices. For my Desktop PC the maximum it can manage is 1 GBits Receive/Transmit.
Also will depend upon how your storage device has also been configured and the device configuration. Also the Ethernet cables themselves need to be able to handle that amount of data ( CAT6 or CAT6E).
So nice thought but for many there will be no differernce in speed on your devices.