It's not really a new tax
I'll repost an edited copy if the second part of my message which has been deleted by a moderator, probably because it was addressing a serious French language error in the title. The title has changed, no French there anymore. However I think that the second part still is relevant. So here it is:
I'm not going to defend a new tax, but as far as I know the way it would work is that people who don't own a TV (at least not officially - see what I mean?) and who don't pay the TV licence ("redevance audiovisuel public") yet would start paying it if they own a PC, tablet or smartphone.
Nowadays each household pays this licence fee ONCE, regardless of the number of TV sets owned. My understanding is that this would be extended to these new devices. It's NOT an extra tax on the price of a purchased device and therefore it's different from the private copy tax. It's basically trying to collect this TV license fee from just every household, which makes sense in a way.