1920x1080 on a 15" screen is a problem for me. 1600x900 on a 14" or 15" notebook works a lot better for me.
But I know 1920x1080 on 15" is not a problem for many. And the extra screen real estate makes multi-tasking a whole lot easier.
My normal workspace is a pair of 24" 1920x1200 monitors.
Some even manage to handle 1920x1080 on 11" & 13" screens
without a problem.
I'm not too keen on doing a shade tree LCD screen upgrade.
Among other issues you're paying for two LCD screens.