Very cool; thanks! I admit my mistake--I didn't realize the new Dell ultrabooks included a DisplayPort. The XPS13 looks like a really good piece of kit (although I've always been a Thinkpad guy). I also admit that I'm in a small minority with the DisplayPort requirement. Surely HDMI/1080p output is good enough for most of the people who would want an ultrabook PC.
Well, maybe. But it's worth noting that Apple doesn't provide both, only DisplayPort (or Thunderbolt, depending on the model). Of course, Apple has never been known to burden their users with the bother of choice. But it does avoid the excitement of wondering if your equipment will all work together now or in the future. The Dell U2711 has HDMI, DVI, and DP. But per Dell's specs, WQHD only works through DVI or DP inputs, even though HDMI 1.3 is used. Who knows why. Anyway, take it easy, and thanks again for responding.On top of that, all of the input devices would need both HDMI and DisplayPort inputs.