Light bulbs are also nearly 100% efficient, minus whatever fraction of light seeps out through windows or similar. As is just about anything else electric. Unfortunately that heat is usually suboptimally distributed, and pales in comparison to the heat pump effective efficiency which as you mentioned can go well above 100%.
Heat pumps achieve greater thermal output than the input energy, unlike electric resistance heating.
The latter is 100% efficient (all energy in is delivered as heat). Heat pumps exceed 100% efficiency, and can deliver 3 to 6 times the heat energy as input, as they are moving heat from the exterior environment to the heated space.
(And it should be - worst comes to worst basic electrical heating can be effectively 100% efficient, and heat pumps can do better)