Apple has quietly added four new iMac SKUs to its product line, with the main differences with the other four being the price (more expensive), the lack of stand (but they gain a VESA mount) and a longer lead time (up to ten days).
The cheapest iMac with a VESA mount costs £1135, £36 more than a similar configured iMac but with a proper stand. Note that the desk/wall mount is sold separately.
It is likely that Apple has identified VESA functionality as a crucial one for businesses and entreprises where the ability to use a mount can save a not-so-insignificant amount of space (and therefore money).
And the fact that it is an all-in-one means that companies don’t have to worry about housing a base unit independently or looking for additional cabling (and there aren’t many all-in-one computers with VESA mounts).
The entry level Apple iMac (2012) has been reviewed here and comes, in its base configuration, with an Intel quad-core processor clocked at 2.7GHz (turbo boosting to 3.2GHz) with a 21.5in 1,920 x 1,080 pixel display, 8GB of RAM, a 1TB drive and an Nvidia Gefore GT640M with 512MB of dedicated memory.