Rosetta 2 - the interesting bit was that it was going to pre-translate binaries instead of at runtime. The implications for actual VM emulation is that Rosetta won't work for run time environments like OS emulation. They touched on it briefly with the emulation technologies bit, but it looks like it will be separate from, and likely much less performant than Rosetta.
They explicitly said that it can perform both static and dynamic translation for JITs. I wouldn't be surprised if there is substantial hardware support too.
I was wondering why did they mention the virtualization. Let's see what technology do they use. Whether it is going to be proprietary or something like Xen.
I meant that it supports dynamic translation in order to support JITs such as turbofan.
But to answer your question, yes a JIT can be static. JIT just means that the compilation happens at runtime, and "static" in this context means that the compilation is happening at the very start of runtime. You could imagine a JIT that compiles all bytecode to native code immediately on launch. The reason this technique is not used often is that it tends to lead to long startup times. But if the result is cached somewhere then it might be acceptable.
The emulation thing seemed to me to be Hypervisor.framework for ARM, as they showed Linux and Docker running (which both run on ARM), but not Windows (which an average user may be more interested in).
