> Computer monitors are most guilty of having some of the biggest power bricks, and I'd love to see them replaced with regular power cables

Dell Monitors have a single power cable (for example this P2418D [1]). Many other manufacturers ship giant power bricks because it allows them to make the screen thinner, and nobody sees the power brick under the table. It comes down to customer preference.

1: https://snpi.dell.com/snp/images/products/large/210-AMUH-mvi...