Have Ledger forgotten that passphrases exist? Or derivation paths? Or even just resetting the device and entering a different seed phrase? Why would anyone need multiple devices?
And the latest gimmick is a protective case? I thought the whole point of this stupid wallet was to stack them together and show a picture on the front and text up the side? Now they are telling you to slap these cheap cases on them to stop them stacking together and to hide the picture and text?
Remember this is a Tony Fadell design, so it has a lot of features that resemble Apple but do not make much sense for cryptocurrency at large. Minimalist interfaces do not really work in this industry.
However:
If you mean multiple wallets in the same HW, I fail to see how that's going to be useful since not only will it have the same effect of generating more addresses inside a single wallet, but there will also be more mnemonics to write down.