Case in point:
Old Doorknobs (some were like this and others were a little less shiny)
Old window sash lock
New window sash lock
What do you think? Better, right? The best part is that this project isn't break-the-bank expensive and they take very little time. Switching out a sash lock costs less than $3 and takes about 5 minutes. Changing out a doorknob costs less than $15 and takes about 10 minutes.