I hope it fixes an annoying fault since the last OTA; I never have had to routinely reboot until this last week, when I keep getting network problems (on both wi-fi and 3G) that are only fixed by a reboot.
They all seem to involve SSL, the most recent being this morning when Google Play failed with a stark "No connection" error screen. I knew it wasn't Google at fault (my Nexus 7 could still connect) so I tried other sites - and with the bizarre exception of Gmail (using the app) no other https site would connect either. Non-secure sites and other network traffic were fine. A reboot fixed it. Again.
Of course my N4 may have developed a fault and the OTA timing was just coincidence, but the rush to get this follow-up fix for some unknown security issue suggests otherwise. I certainly hope so anyway.