Keep in mind that what your usage statistics are telling you is that the screen has accounted for 53% of the 70% of the battery that has been used. That means the screen has used approximately 37% of the total fully charged capacity of the battery at the point that screenshot was taken. That's not too far off from what others have reported in the past when taking into account the percentage of battery used and the screen-on time.
I've noticed since upgrading to ICS that the battery stats show the screen as using a higher percentage of the battery than was reported in Gingerbread. To me, if the ICS system itself is more efficient, an increase in the reported battery use of the screen makes sense since the screen will still draw the same amount of power as it did before (because there hasn't been any hardware changes to the screen or how the screen operates), while most system processes will draw less. With ICS, I haven't experienced any noticeable decrease in battery life, and I'm still getting pretty much the same amount of screen-on time as I was with Gingerbread. And of course, as has already been stated, the screen will always be the biggest drain on the battery unless you're using the phone for an extremely long period of time with the screen off.