Well yeah they went with high clocks which means a lot of heat to go in a small die. More cost efficient APU and design goals so they needed a beefy cooling solution. Which also meant taking TIM in consideration. Different design methodology between the console manufacturers and tbh I find it facinating, its different.
If I had to guess that APU will be pulling around 230-240W. Leaving the rest of the components and some headroom for the PSU.