Large companies like Google and Facebook will easily be able adapt to the change. They have an army of lawyers and workforce for this.
Smaller startup? They will face challenges. Especially European ones.
Most possibly, this "innovation" will end up as one more pop-up with "Accept or Leave" message on every website you are visiting from Europe for the first time.
It was a very important step for people of USSR to understand that TV != truth. The movie was to the very point. Quite an important topic for USSR with an absolutely absurd statement just forces people to think and rely on their own judgement only. And it simple to do in this case.
Now people not just was given a freedom to think. Now it is a must. To think and to have OWN opinion.
I guess, you suggest to add 'about us' and 'product overview' info to the main page. Correct?