Some of these weapons did see action in the last days of the war, and would form the basis for future developments that we take for granted, today.
Panzer Munchenberg had an ENTIRE COMPANY company of panzergrenadiers equipped with the Sperber IR system, as wel as several IR-equipped Panzers.
The single Sperber-equipped JagdPanther at the Seelow heights gave the Russians fits every time they tried to move tanks under the cover of darkness, until it was finally knocked out by an artillery hit.
If the Sperber System had been deployed just even weeks earlier, it could have devestated many of the late-war Soviet and American spearheads before they ever got started.
The German IR systems were great for what they were. In fact they had IR systems throughout most of the war, but they required recharging in sunlight and only worked part way through the night.
Again, some German advances were great, but most were years away from panning out, and many were just boondoggles.