watch this space⎯⎯⎯⎯>
they already do ones for the iMac, 27" Display version (TB & non) are on the way:
http://www.macframes.com/27-cinemathunderbolt-displa.html
I am not affiliated to this company, I just found it through a google search.
Being a seasoned pro photographer for over 2 decades & now owning a 27" ACD, I can tell you that the glare/reflection/mirror comments are way,
way overhyped;
to the point of being bullcrap in 99.999% of cases; most of the people are just regurgitating what they read; they have no clue of what they are talking about.
You never want a light source behind your display (that would be plain stupid!),
especially if it is matte display!
Matte displays like the Dell u2711 are atrocious with their sparkle effect & their dispersing reflections throughout the whole display area (instead of showing a pinpoint lightsource) thus creating a hazy image that lowers contrast & kills tonal & colour gradations; I should know because that is what I tried before going for an ACD.
The lack of a large light source behind the display combined with a
hood will ensure accurate colour & a smooth gradation in tones;
of course paired up with a hardware based profiling & calibration of the display.
These 3 proper procedures & their careful implementation are way more important than if the display is gloss or matte.
For a real pro monitor check out Eizo
note that they come with a
hood (& insist that you use it, otherwise their customer support can't & will not help you as regards to profiling issues); as well as hardware calibration.
Let's also dispel some wide gamut myths: not just for the fact that 99% of advanced photographers (let alone non-knowledgeable users) will never ever be able to take advantage of a true higher-bit wider gamut display like an Eizo (the Dell 27" doesn't fit that category, do a deep google);
ie: switching back & forth from using a wider/normal gamut display will have no effect whatsoever, none, nada, zero, zilch in their workflow;
but also that so many people will be using their monitors in abyssmal condition without
proper profiling/calibration & shielding (hood),
and the fact that most advanced photographers (read: 99% of the self-professed photogs on dpreview, photo.net, POTN, etc) , let alone non-imaging power-users, will have absolutely no clue how to implement a wide gamut complete workflow
let alone use it.
Try to find a good place for your monitor setup & go for the Thunderbolt if you prefer it, it has more connections than the Dell other than extra display port options which
a) you will not & can not be using at the same time
b) you don't really need if you have a mac.
Regards,
JF