I think there is good chance, they remain at the top, for a while, but a low chance there will be a huge gap to the competitors, when they have access to the same tech stack.
The M1's speed and efficiency are mostly not the result of something ground-breakingly smart, but 5nm TSMC and a non-modular design, integrated chip platform. In other words: They played monopoly and made a huge compromise on the design front. I don't expect they could pull off another leap like that soon. The M1 isn't magic, as far as I can tell.