I'm a consultant working in UK public-sector IT designing, delivering and assuring large systems. I'm also a mobile technology blogger writing about mobile products, services and the people who creates them.
I co-founded the mobile technlogy blog 'The Really Mobile Project', built the @uktrains Twitter service to provide better train-travel alerts and created 'Bloggers in Suits' to gently remind the 'social media experts' that the social web is for all of us.
Apparently (with thanks to @alexjs for these two links) this is "U-156" being filmed in conjunction with the BBC. It depicts the 'Laconia Incident' from World War 2 - according to the always-reliable Wikipedia: In late 1942, a German U-Boat sunk the British troopship Laconia carrying 1800 Italian POWs off…
The new iMac's also a display via its MiniDisplay port which is an input and an output. A smart feature to hook a few of us laptop owners...