It might have useful applications for monitoring printing temperatures, bed heat or controlling cooling.:
USB eval board ~$75 from DigiKey, sensor alone is ~$40 ea.
Melexis MLX90620 is a
16x4 array, - 20°C to 300°C, +/- 1.5°C accuracy between 0-50C. Frame rate up to 512 hz.
Eval board ~$370, sensor ~$84 ea. from DigiKey.
Getting either to work right requires attention to thermal design. Emissivity of the object you're looking at changes the detected temperature, accuracy is reduced as frame-rates go up, etc.etc.etc...