Today´s computer monitors are getting both bigger and better with higher resolution, faster update, better contrast, etc. But with higher screen resolutiions and big screens (40" and bigger) desktop work sometimes can be difficult due to the fact that all windows, buttons, icons and so on are getting very small. This can be an issue, especially if you like me is starting to get somewhat poorer sight due to aging(!). But no worries, in most desktop environments now a days this has been solved by being able to scale the content on the desktop without having ti compromise resolution.