It's a hefty beast, thanks mainly to its 27in articulated 10-point touch screen. This offers height adjustment and also tilts way back to allow comfortable fingertip operation without the need for those tired mid-air zombie arms you get when attempting to use a vertical touch screen for any length of time.
The display features the same size ultra-high 2560 x 1440-pixel resolution of the 27in iMac, but also features stunning Adobe RGB colour. Booting up Windows 8 results is a slap in the face by a Start screen filled with outrageous colours entirely impossible to display so luridly on the vast majority of PC monitors. When impossible red and impossible blue jostle for attention within a single icon, it tickles the brain in unusual ways.
This is both a blessing and a curse – being able to display such a wide range of colours is great for those creating output destined for print or eye-catching product packaging, but for most users it simply increases the chances of getting their display colours hopelessly wrong. Careful colour management is a must, but in the right hands this display is superb and also extremely accurate. See also Group test: what's the best all-in-one PC?
Dell XPS 2720: components
Behind the display, we find a most powerful processor. The 3.1GHz Core i7-4770S is one of the latest low-power Haswell versions and this helped the XPS 2720 achieve an impressive 6091 points in PCMark 7, assisted by 16GB of memory and a 32GB mSATA solid-state drive which boosts the performance of the main 2TB hard disk through Intel's Smart Response Technology (SRT).
A powerful nVidia GeForce GT 750M graphics chip is included which delivers playable frame rates for gamers, around four times the speed of most of the competition. However it still achieves only around half the graphics performance of the iMac.
The XPS 2720 is packed with features including a 2.1Mp webcam, six USB 3.0 ports, Thunderbolt and a Blu-ray drive. The warranty also includes a year of next-day in-home service, so you won't have to ship your PC off for any required repairs. See: more reviews of all-in-one PCs.