A new security pre-approval system, ETIAS, which is similar to ESTA (US), travellers who do not have an EU passport will need to pay €7, which is not only a crafty way to screw more money out of travellers, but supposedly a security precaution to make sure you're not a terrorist.
In his 2016 State of the Union Address, President of the European Commission, Jean-Claude Juncker has said the following:
We need to know who is crossing our borders. This way we will know who is travelling to Europe before they even get here.
This is yet another method of control over those who travel.