DP or HDMI?
For most enterprise applications using monitors, DP is the way to go. DP is replacing DVI on many monitors. HDMI is very prevalent in the consumer space (televisions and high-end/gaming graphics cards) and for projectors. Both DP and HDMI seem to appear on most modern monitors replacing DVI-D and VGA. HP appears to offer more DP considering HP's catalog of HDMI monitors shows 19 choices but their selection of DP monitors shows 29 choices. Samsung seems to be a little more HDMI having 26 HDMI and 10 DP monitors. Dell is definitely in the DP camp but their higher-end monitors also have HDMI. HDMI can be unplugged easily, sometimes accidentally, as compared to the latching full-size DP connector. This can mean IT service tickets just to plug in an HDMI cable. It just comes loose much more easily than DP.
On the PC/Macbook, it seems there are many more DP/mini-DP ports showing up than HDMI/mini-HDMI/MHL.
All this leads the DocKtor to believe that companies are better off buying monitors with DP other than HDMI if given the choice. BTW, VGA still ain't dead.