Dome cameras come in a multitude of configurations such as vandal proof, day/night, wide dynamic range (WDR), infrared (IR), and even Pan/Tilt/Zoom (PTZ). Their versatility allows them to be used both indoors and outdoors. Some dome camera housings can even be painted in order to match its environment. Another benefit is the ability to mount the cameras both vertically and horizontally. In addition, dome cameras can be configured with a smoked cover which makes it much more difficult for a criminal to determine which direction the camera is pointing - a feature other cameras styles cannot offer.
So if you are looking for an inconspicuous security camera solution that will blend in with your existing decor, you may want to take a look at a dome style camera.