Atlantis should come in with similar performance per clock to an Apple M1, but probably at around 2.5 GHz instead of 3.2 GHz.
That's close enough to be unnoticeable for most people for most uses, at least on the CPU side. It'll come down more to how well things such as GPUs and video CODECs are supported.
There are plenty of people using M1 or similar e.g. Zen 2 machines today with no inclination to upgrade. They are more than good enough.
It really doesn't matter much. The Titan and K3 are Core 2 performance, the K1 and JH7110 are more like Pentium III.
A 1.5 GHz Ascalon is still going to be ... I don't know ... Skylake level? More than enough for a usable modern desktop machine and a huge leap over even machines we'll start to have delivered 3 or 4 months from now.
Hopefully it will be affordable. As in Megrez or Titan prices, not Pioneer.
That's close enough to be unnoticeable for most people for most uses, at least on the CPU side. It'll come down more to how well things such as GPUs and video CODECs are supported.
There are plenty of people using M1 or similar e.g. Zen 2 machines today with no inclination to upgrade. They are more than good enough.