LCD monitors started outselling CRT monitors starting in 2005. Their
many advantages over the conventional CRT's include smaller size,
lower weight, reduced power consumption, lower heat and radiation
emission. Due to ease of fabrication, manufacturers are able to build
them in an increasingly large number of sizes and form factors.
Moreover, favorable economies of scale are driving there costs lower
and lower with every passing month.

For furthe info see:

LCD Monitors -- Description of Basic Specifications
http://www.altafkhan.com/ib/lcd-monitors.htm