I'm often-SLF, trespassing in the CC area here, but one thing to understand is that there is not just one standard of Premium Class travel, but each carrier does their own thing, and standards differ.
Nowadays the key differentiator in Premium travel is the ability to access the lounge beforehand, particularly where you are on a carrier who does not give you access with frequent flyer status. The same applies to bag drop facilities. Yes, if you are taking a laptop and a computer projector plus a couple of suits you need to go to a desk, hopefully the one without a 45-minute queue.
Some carriers supply meals to premium pax only, which are a benefit significantly appreciated by those who between 05.30 and 22.00 in the day are either driving to/from the airport at both ends of the flight, giving their day-long presenation, or spending their "lunch" break on interminable phone calls, etc.
It is not normal to provide 6-across seating on Business Class. BA do on domestic flights, but the fares sometimes do not differ much and are driven more by yield management, and the discovery that when booking on the day Premium is all that is available. Elsewhere adaptable seating units that can be reconfigured have come (and to some extent gone again). Adaptable seats get round the problem that premium demand varies significantly by route, time of day and day of week, and a fixed seating arrangement is wasteful. Unfortunately they have never been anything other than a second-best compromise, which spending 4 hours in the CENTRE seat of a BA A320 adapted to 2-3 for Business class on London-Moscow at £2,000 return only reinforces. Meanwhile Aeroflot have proper 2-2 seating, cheaper fares, caviar canapes, etc, and bring us back to the original point that standards vary widely between carriers.