Technology is a wonderful thing. In the past few years the invention of the laser leveling system has been advancing to the point that the average homeowner can afford this precise measuring instrument, and it can be used in a magnitude of ways, here are just a few.
Often, with modern artwork, and mechanisms such as pendulum style clocks and televisions, having the piece absolutely level is an important step in having correct functionality. With artwork, sometimes it is critical, so having a display surface plumb and level can be imperative, especially with larger pieces.
Laser Saw
Leveling is also an important part of interior decorating. Leveling shelving and home entertainment cabinets is becoming increasingly more important. Large screen and flat panel televisions work. With more clarity and color definition when level. The more elaborate curtains and drapery must be leveled and plumbed for the appearance to be right. It always looks good for the displayed photos and wall art to be hung with a nice pattern, and hung straight and true.
Also in the interior decorating category is wallpapering. Wall murals are often complicated, and difficult to apply, even under the best circumstances. They are also very popular. I could not imagine hanging wallpaper correctly without a plumb/level, straight edge, knife, etc. The job would just be too hard, and some laser level include a plumb mark also, This is one invaluable tool in these cases, and will, often, pay for itself in the first use.
First impressions are important, and if a person feels out of balance due to displayed objects being out of plumb or level, the initial impression is not good. Unless that is the desired effect. In which case a laser level becomes even more important. Some laser leveling devices can tell you the grade or degree of angle of an object or line. This allows, if desired, a person to set everything in an area to a specific angle. Thus creating an illusion of imbalance.
Whatever your use, leveling has become more important in today's society. In artwork, interior decorating, and construction events and projects, and will probably continue to become more important every day.