Very cool set of tests!
With a 640x480 native sensor, it will probably move by one pixel between each shot just sitting on a tripod... e.g. with a 36 megapixel camera, it is totally impossible to shoot the exact same set of pixels twice, the camera just has to move by a tiny fraction of a bee's d!ck...
Even with a high resolution DSLR, you can benefit from making a focus stack (i.e. you aren't trying to fix a bad sensor, you are trying to get a deeper depth of field).
Looking at the image in the original post, it seems to illustrate that with a very low resolution sensor like the Seek, the "manual superresolution" adds a lot more value than it does to a higher quality thermal camera. (At the cost of adding a lot of time and work to the process.)