is that a layer on top of a layer? it's hard to tell but if it is some sort of skin above the krausen it may not bode well
if I am seeing things and that breakup on top is your krausen layer and there is no layer underneath then it is most likely the yeast dropping off and once it is nearly clear you would prolly bottle (after doing your readings over a few days)
is it your first glad-wrap?
<edit>
I guess if any sort of activity on the top increases each day from here, it would be unwanted activity...of the most evil kind