One of the key factors that defines the modern smartphone is its touchscreen display. There are many variables including the size of the display, the type used (capacitive/resistive or TFT/AMOLED) and resolution. The Sony Ericsson Xperia X10 has a gorgeous 4-inch (480 x 854) TFT display.

Apart, from the size, in case you are wondering how the screen fares against other Android smartphones, Mobile01 did some extensive testing against the Nexus One, Motorola Milestone, HTC Hero, G1, Samsung i7500, HTC Magic and Acer Liquid. Click through to see how these displays compare under different tests.