It is all about control. The internet and mobile phones have made it easier for everyone to get information, work with others, plan and execute an action.
Most of us would say that is a good thing. This new found freedom is great for us, But it is very threatening for a Government. The powers they are about to take allow them to take back control.
As usual, this is done by concocting a bogus threat and then taking powers that will supposedly counter the non existant threat. Dress it up as crime or terrorism prevention and people will support it.
The Government already have powers to snoop on criminals and terrorists. Why they then need these new powers to snoop on everyone else is sinister, and we should all be suspicious.