Switch is quite weak, it is a heavily CPU downclocked early 2015 SoC released in 2017 which hurts third party games a lot. Even 2017 iPad Pro is three times the CPU and two times the GPU performance, 2018 iPad Pro is about five times the performance which is already a sizeable generation leap released in similar time frame long before even the latest Switch revision. Apple SoCs have been at the cutting edge for many years now in terms of architecture and process nodes, their CPU ARM cores rival the best Intel and AMD have already. Latest iPhone already outperforms Zen 2 in single core performance. Next-gen consoles will be targeting high resolutions and maybe ray tracing so next Apple product should be able to play games at 720p-1080p at similar framerates without too many compromises, should be over 2TF GPU power which is plenty given what the PS4 can achieve. The gameplay which is the main thing should be close to identical.