I bought an Android handheld for emulating a little over a year ago (the Ayn Odin), and I think I’ll stick with it. Honestly, I don’t play a lot of games on my phone and haven’t in a while (part of my effort at reducing time spent using screens, I suppose). And using a dedicated device means that I have a device with physical controls. While I do have a Switch Pro Controller lying around, it would be one more thing to carry around with me, I reckon. Instead, I can bring the Odin on trips and use it when I want to emulate. (Additionally, emulators like Dolphin already run on it fairly well - depends on the game, really.) But for people who want to emulate on their iPhones, I guess this is great news.
(Well, I suppose I could see myself maybe having some of the Harvest Moon games on my phone. They generally don’t need the sorts of precision inputs that a lot of games do, and they’re the sort I could keep on playing as long as I’ve got a goal to pursue in game. But do I really need to be able to play them wherever? Not really, that’s another part of the reason why I bought a dedicated device, I reckon.)