Wasm is great for sandboxing so iOS could make Wasm first-class native citizen. Then Wasm module could have access to anything and everything iOS and one could write "native" iOS applications using any language that compiles to Wasm.
I also feel like this is just a weird year for software, because we've got Wasm making huge strides ("let's make it easy to sandbox everything like javascript"), discovered Spectre ("oops, our assumptions about javascript being a good sandbox were maybe wrong, we apparently need to use hardware-enforced process separation"), but also many other permutations of these things in other spaces (such as the WSL2 announcement of a new integrated Windows-Linux environment, vs. containers vs. VMs vs. WSL1 vs. Wine vs. micro-services).