No, actually not.
The All-business airline pitches are:
Privatair - 56 inches (narrowbody)
Silverjet - 60 inches (narrowbody)
LŽAvion - 48 inches (narrowbody)
As for 40 inch pitch... well the SQ 340-500 has 37 inches 7 abreast Executive Economy, but they are getting rid of it.
The B747 does not fit the bill with its 3-5-3 arrangement
747 has never had 3-5-3. And no other plane has had it.
747 is usually 3-4-3.
Once upon a time, standard 747 Economy was 3-4-2, 9 abreast.
For most airlines that do have premium economy, it is a small section at the very front of economy. Not so on EVA Air. They have a huge 8 abreast, 38 inch or so pitch premium economy on 747, and a small economy minus at standard 10 abreast and 32 inches pitch at the rear. Do they do well with this business model? And does any other airline follow suit?