You've asked for an intrinsic difference between a class of devices: no, you are unlikely to want to run general purpose apps on your washing machine. Yes, you are likely to do so on your smart phone. Probable on your modern "smart TV". Low probability on your eReader.
Legislation like EU Cybersecurity Act hopefully pushes things into more of a fundamental rights thing by demanding that devices don't go into the trash pile as soon as the vendor stops issuing security updates by mandating an ability to keep operating these devices without negatively affecting Internet at large (by, for example, becoming a part of a botnet).
This is already possible with many general compute devices by putting a version of up-to-date GNU/Linux or FreeBSD or... on it. And for a smaller subset of GC smartphones, with AOSP-based Android.
I'm not asking for an intrinsic difference: I'm suggesting that if "I can install custom applications/code on this device I own" is a fundamental right, there would need to be an intrinsic difference. My personal opinion is that there is not an intrinsic difference. That "I want to do it to these devices and not those" can't be the justification for it being a right that I'm able to.
Legislation like EU Cybersecurity Act hopefully pushes things into more of a fundamental rights thing by demanding that devices don't go into the trash pile as soon as the vendor stops issuing security updates by mandating an ability to keep operating these devices without negatively affecting Internet at large (by, for example, becoming a part of a botnet).
This is already possible with many general compute devices by putting a version of up-to-date GNU/Linux or FreeBSD or... on it. And for a smaller subset of GC smartphones, with AOSP-based Android.