Underfloor Radiant Heating can heat up a room but it will heat the room slowly and it will have a hard time keeping the room entirely warm in frigid weather.
Underfloor heating is also great to keep the floors warm especially if you're like me and love running around the house barefoot and hate cold floors.
You still need your central heating or other heating system to heat your entire home up and keep the room you're in and the rest of the house warm in really cold weather.