That FB message is so old. What happens is a few people will resend it out to get people worked up, and it will die out again soon.
Yesterday I would have thought editing photos on iPad more as a novelty. However I subscribe to Peter McKinnon on YouTube and just watched his video from yesterday and I think I'm kind of sold on this idea.
Now half of me thinks yeah, this could be a good idea, while the other half things he might have been trying to sell his Lightroom Presets.
Have you tried editing on your iPad?