OS X handles the display to ensure the best user experience (i.e. that things can benefit from the extra resolution without making fonts, etc. unreadable). Solaris, obviously, won't do this, so the worst that could probably happen is you'd need to choose a sensible resolution.

I tend to agree with Peasant, though, that I'm not sure what you are going to learn by installing Solaris in bootcamp, or however.

Unless the place you're going to be working is using MacBook's for their Solaris servers, anything that goes wrong with it will likely serve you no purpose later on.

VMFusion is, IMO, far and away the best Mac virtualisation software around. Make the most of it