I am quite sure most, if not ALL airlines, have PTVs in their first and business class.
While PTV is a good thing, there are MANY other things to consider such as service quality, food etc. Sure I would love to have PTV but if it doesn't, it won't bother me that much. I normally read a book, a magazine or listen to music.
And some people don't even know how to use them. Also you are not likely to be comfortable since there is a little box in front of you.
There are cons and pros.
Do you choose an airline based on whether or not it has PTVs? I don't! Some people do!