I might be underestimating how this might be important in your daily morning routine, but I can fairly well tell the weather by looking thru the window. My alarm is set on phone and I'll have pretty good estimate how much time I've spend in shower.

To-do looks somewhat useful if you actually update it. It's something your phone already does. Personally it is almost always empty as I do not put work items on it.

Stock price and xkcd looks just as gimmicky as first two functions. It always make me cringe a little when smartphone manufacturers advertise their lock screens with such widgets.