Here are some examples showing the difference between the SEEK thermal and a ATN OTIS thermal unit.
Shot of my NAS, back up power supply, router and other things. SEEK

Footsteps on the carpet

House across the street

Car three houses down and across the street

Things to notice. At the distance of the car you would have a difficult time making out a man sized target. Especially if they were closer to ambient temps.
Now here is what things look like through the ATN. Much larger sensor and you can focus the optics. Granted it is a much more narrow field of view (you can get different lenses)
NAS server and sewing box behind it. Scale next to it.

Same car three houses down and across the street.

Nextdoor neighbors exterior wall (you can see the studs and nails)

Cat prints on carpet (closest) and tile (through the door)

There are uses for both of the devices. This is just to show the difference in image quality between something that costs a couple hundred dollars and something that costs a little bit more.