Thermobaric means that the explosion uses oxygen from the air and don't need to carry oxidizer. Thermobaric weapons are not that rare. They come in all shapes and sizes. Russia has thermobaric warheads for RPG-9's. The US has 40mm thermobaric grenades.

TOS-1 or TOS-1A mentioned in the article are relative short range 3,500 m - 6,000 m. They destroy effectively areas of few hundred meters in diameter. But missiles are big and supply logistics needed is extensive.