I just went trough F1tv FAQ on their website and I noticed the PRO version is supposed to be getting a few new things this year:
In the "What is F1 TV and what do I get with it
Everything with F1TV Access plus the following:
Live Race Coverage
On-board Driver Cameras
Full Unedited Team Radio
Full race replays, immediately after the race has ended
Historic race archive
Head to Head / Battle mode – App only
Pit Lane Channel
Driver Tracker Maps
I don't know if these 3 last feeds were already listed last year, but I do know they weren't available to watch. I did a quick google search on how this feeds may look like (i was primarily interested in the "data channel", since the other 2 are nothing new), this is what came up:
I'm almost 100% certain this is the feed some pay tv broadcasters will get this year: german sky (confirmed in their TV guide), spanish movistar, maybe ziggo sports, unsure about SKY UK since they get their own race control version. This version includes the "onboard mix" channel, which sadly isn't listed in the F1tv PRO feed list, but even only the DATA channel would be a superb adittion in my opinion. It would give us f1 nerds on this forum massive amounts of data to munch trough and compare cars and their strenghts / weaknesses against each other MUCH more easily and with higher precision.
Personally I can't wait to see this in action in a few day time.