There are some big players already present on the market such as Tangem (only contactless) or Satochip (dual-interface).
Arculus, Cryptnox and CoolWallet are also worth to mention.
These are all decent wallets! The one major difference is that Keycard is full stack open source, both card + wallet, Arculus and Cryptnox aren't.
I remembered CoolWallet as the one with display. But it turns out they plan a new one, a JavaCard from the looks of it. I haven't talked to them in a while, and the website doesn't mention the tech stack. But it looks like it's used for backups only. Via NFC. Interesting! Quite expensive for a feature you can just used Keycard for, though.
Do you plan to open your "shell" to other smartcard player for a better interroperability?
I have Tangem 2 and use it primarily to top up my crypto card while on the go. Because of that, I would have little interest in their "shell" accessory
which requires the wired connection. One of the key advantages of Tangem is that it connects wirelessly via NFC to its dedicated mobile app
that is very convenient for mobile use.
Shell can be used 100% air-gapped. No wired connection. You sign transactions by pointing Shell's camera to a wallet like UniSat, BlueWallet, ... etc. Then confirm on Shell's display & sign. Then let UniSat read the signature QR on Shell's display.
Fully air-gapped. Shell's usb port can 1) have data turned off 2) be used for charging only.
Keycard also works via NFC - with one open source EVM wallet - Status.im - for now.