To read between the lines of the pubished reviews. To see through the marketing claims.

Joined November 2020
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Apple M1 thread
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Should AMD and Intel be worried? No. The x86 architecture can handle a lot of complex instruction sets that isn't just possible with the ARM based M1. Apple Silicon, no matter how better it gets, won't be a threat to x86, at least in the near future.
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Running iPhone and iPad apps natively is no surprise as the hardware is basically the same. However, the lack of a touch screen doesn't make a very good case for the usability.
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The M1 is an excellent chip, though it falls short of Apple's tall claims even in carefully chosen workloads.
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What I hate is that Apple has locked out of measuring the clock speeds, power usage and temperatures. Hope that it is made available in future updates.
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Battery life seems to have improved over the previous generations, though not up to the claims unless tested under ideal conditions.
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Things get interesting on the GPU side too. The GPU performs dangerously close the GTX 1050, which is very impressive considering the low CPU GPU power envelope.
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Having said that, the M1 is a very efficient and powerful chip. I'll be happy to see the M1 benchmarked with a standard test suite after a few months when the platform is more mature with more native programs/benchmarks.
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The M1 is hence not even the most powerful 15W chip, let alone being the most powerful chip.
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But here we are. Extrapolating the data available, it can be inferred that the 4th generation AMD Ryzen U chips can perform around 1.2-1.5x (with a few outliers) of the M1 while still within the 15W limit.
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Going through reviews, I see that benchmarks and even the competing hardware seem to have been cherry picked to highlight the advantage of the M1 chip.
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