1. If done correctly, non-Apple laptops may become significantly less attractive. Just like Android phones.
2. Intel may be in for a tough time, especially with AMD winning big on the console and laptop fronts recently.
3. AMD and Intel may have to compete for survival and to save the non-Apple ecosystem in general. If AMD/Intel can consistently and significantly beat Apple here, it may mean that the non-Apple ecosystem survives and even thrives. It may even mean that Apple looks at Intel/AMD as an option for Pro MacBooks in the future. However, this does seem a little less likely.
4. This could also herald the entry of Qualcomm and the likes into laptop territory.
Looks like a very interesting and possibly industry changing move. This could potentially severely affect Intel/AMD and Microsoft. And all these players will have to play this new scenario very carefully.