Any threats to Intel's (almost?) monopoly on laptops/desktops is a good thing.
Dropping prices temporarily until a newcomer is strangled is something we've heard of in the past, but this time the competitor has a huge and growing mobile market, so the threat and lower prices are likely to stay around for a long time.
With current super bloated state of the web, Electron apps and other disasters? Probably all of them.
I could even fantasize about a scenario where Intel: "if you launch an ARM laptop we'll raise our prices" Microsoft: "fine, we will switch to AMD"
Information about Intel internal architectures is highly confidential, but there are remotely related technologies that are generic and public, for example https://en.m.wikipedia.org/wiki/Register_renaming
Microcode (which is one of those highly confidential things that both Intel and AMD hold close and dear) is about doing an on-the-fly CISC to RISC transformation because you realized that the legacy x86 ISA is an absolute pain to handle (but you aren't willing to give it up).
Register renaming is a key part of high performance ISA emulation. The x64 has 16 gp registers but the internal RISC normally has 80. Of course this is also a key part of OOO and alike as you mentioned.