What is the legacy of Ancient Roman art? How do the Romans compare to the Greeks or Egyptians in terms of style and subject matter

ZERO SOURCES; One paragraph; with the information provided below answers the question; 
What is the legacy of Ancient Roman art?
How do the Romans compare to the Greeks or Egyptians in terms of style and subject matter?

Fascination with ancient Rome is usually focused on its imperial years. At its height, the Roman Empire stretched across thousands of miles including present-day Spain, France, England, Egypt, Turkey, and Syria. Romans built monumental architecture, enslaved, millions, and conquered and assimilated countless cultures.
Ancient Romans assimilated, but they also innovated. They invented concrete and used it to build a metropolis in the ancient world. They painted and sculpted, fought hard, played rough, had running water for fountains and bathhouses (bathing was a big part of Roman life), and built the largest race track (Circus Maximus), the largest stadium (The Colosseum), and the largest dome (The Pantheon).
An argument is often made that much of the foundations for Roman art and architecture came from cultures that predated them, many of whom they conquered. This includes the Greeks, the Egyptians, and the Etruscans. The Romans often get the rap of imitators, but nothing comes from nothing. All civilizations have tributaries. Its true that Roman art and architecture werent as aesthetically pure as High Classical Greece, but Rome was a giant cosmopolitan society. At its height, the city of Rome had one million people. A staggering number two thousand years ago. The term all roads lead to Rome helps explain the complex and multicultural nature of Rome in antiquity with dozens of languages, animals, and goods from all over the empire. The Colosseum might show lions, tigers, crocodiles, bears, hippos, and elephants.
In the video below, you can see just how impressive ancient Rome was at its height. The world in antiquity was full of color. Rome was painted and gilded. Time has stripped away the color; thieves have stolen the adornments. The white-columned buildings of Greece and Rome we see today are bland in comparison. The size and scale of the structures are a testament to Roman engineers and to the strength of concrete. Its important to point out that no one had ever tried to place a giant dome on a giant cylinder vis–vis the Pantheon, or stack arches 160 feet high over rivers.