I will watch as much of the race as my router allows (it seems to not like being on the internet for more than about 8 hours at a time, these days). If the weather is bad, I may even get to watch the last bit at my parents' house and see video for a change.
Perhaps, in combination with a more coherent video strategy, Ferrari + WEC could be a winner. (I'd like to see a "segmented race replay" put on free-to-air/high-reach channels, where the 6-hour races were split into 6 1-hour pieces and shown in the same timeslot each evening across a week - perhaps a few weeks/months later, when casual viewers have forgotten who the news stated had won the race and devoted fans don't have any other races to watch. The Le Mans could be shown in the same style across 4 weeks, maybe during the winter. Anyone wanting to follow along live would still need to get pay TV or (free) Radio Le Mans).
Also, I'll be cheering on Ferrari. Forza Fisico in the #54 GTE-Am Spirit of Race car!