Computers are used to solve problems, and the type of problems they solve depends on their algorithms and hardware as well as their capabilities and limitations. Imagine what would happen if you could lift these limitations once and for all? What would modern quantum computers be able to do then?
What has made quantum computers so exciting lately? Perhaps the fact we are approaching the limits of computing capabilities of the kinds of transistor-based machines we have long been using. They are limited by the laws of physics, which prevent us from packing more processors