"theoretical physics" is such a big and ambiguous concept that physicists tend not to use the word in discussions. Thereotical work often involves a lot of numerical simulation on super computers these days which are kind of their own "experiments". And it is usually more productive to just mention the specific field, e.g. astronomy, condensed matter, AMO etc, and you can be sure there is always a lot of discoveries in each area.
"theoretical physics" is such a big and ambiguous concept that physicists tend not to use the word in discussions. Thereotical work often involves a lot of numerical simulation on super computers these days which are kind of their own "experiments". And it is usually more productive to just mention the specific field, e.g. astronomy, condensed matter, AMO etc, and you can be sure there is always a lot of discoveries in each area.