This is some great news, PC gaming is getting some great support from developers in the form of extra features and actual development time that is put into these additional features. Battlefield 3 is being developed on PC first and ported down to the consoles and now the people behind Deus Ex: Human Revolution are showing off support for AMD's Eyefinity, which they've written support for up to five (5!) screens.
The video shows a triple-monitor Eyefinity rig playing Deus Ex and you can see it already looks great with the HUD centred on the centre screen - without additional .ini file hacks and edits. Looking forward to playing this on my multi-monitor rig for sure!