Huh? That doesn't show that. If you really wanted to know with certainty, you'd have to calculate the ratio of silicone area to performance for both consoles and compare them. I'm pretty sure PS5 will be an order of magnitude more efficient per unit of silicone.
The PS5 CPU is 95 times faster than PS2. If PS5 was somehow LESS efficient per unit of silicone, it would need at least 95 times more of it just based on that one statistic.
Imagine you have a machine that's 1 foot wide that spits out 1 pancake per minute. And then a machine that is two feet wide that spits out 100 pancakes a minute. But because it's twice as large, you call it less efficient for the materials in the machine. That is type the comparison being made here and it's silly!!
What I meant to say (I said it in an incoherent way as I was tired) is it's taking bigger and bigger chips to see more performance gains compared to the past, and they need more watts to function.
I know what you're saying, that performance to watt ratio is far far better today, but it has to be. I'm talking about what chips could achieve relative to their time, though.
Basically PS5 is less efficient because it can't use a chip that is as small and low power as PS2, if it did we wouldn't have anything that resembled a generational leap in performance compared to the past.
Though PS5 to PS2 is not the best comparison to show this as PS5 is not more power hungry than og PS3.
Compare PS3 to PS2, then ps1 to PS2 and compare wattage and silicon area and you'll see that was the turning point for efficiency.
Or look at the rumors for the 4xxx rtx gpus. Everything is getting more power hungry to facilitate performance gains ; that is the opposite of efficiency. Because they can't do it with die shrinks alone anymore.