Clarity = focus
Improving the resolution increases the level of detail available to the human eye, but has no impact on the focus of that detail. The improved picture quality is real, but the focus remains constant.
As a matter of fact, I just ordered the DCS-932L
If you are happy with the DCS-930L, you should definitely like the DCS-932L. The night vision works flawlessly. The only issue is a crackling in the audio experienced by many users (not sure if this issue carries back to the DCS-930L as well). Audio is audible, but the crackling seems to be a nuisance for some users.