You can call or re-name the device category whatever you want. Unless the GNU/Linux development and marketing for whatever reason isn’t really focussed on a joint effort to get a simple and unified product line-up to the general public it won’t get adopted at all.
The communities and manufacturers should get together in order to unchain a real revolution for GNU/Linux based devices rather than continue to splintering the amazing operating system and devices, several stores with trazillions of odd named applications that do not appeal to Average Joe in any way
Better have collaborations emerge to get the devices up for display in (online) shops and presented by telecom and privacy oriented ISP’s. This should gain more interest and push GNU/Linux based devices on national levels. Remember, unlike the community members, to non tech-savvy people in the street Linux in general is still perceived as an obscure operating system, that is if they are familiair with Linux in the first place.
If not taking the joint effort route, like the many forks and individual communities, the GNU/Linux devices will end up being yet another obscure products used by a select targetgroup. Restraint and depending on little donations, no dedicated independent major investors, not stimulated by governments financing as being a true disrupting way to break the duopoly, no adoption by school systems, limited and splintered development resources and just a bunch of active community members to take this forward little by little.
You may be fine with that for now, but when the Librem 5 V2 and Pinephone V2 will arrive and turn out to be real competitive products there will be no substantial basis to market them.
I would hate to see Linux portable devices (I prefer Linuxphone because that’s what it is) not succeed and seeing the devices be just in limited use.