it's well known that OMAP5 includes HDMI-TX, but not DisplayPort... (TI is quite open on their specs, cf TI's website)
And if that's not a leading Apps processor, I don't know what is.
And as a consumer, I do care that enabling displayport on a 24" LCD costs about 15% of the price of the LCD. I'll live with the added power-cord (hopefully USB-based) gladly.
Consumers go for convenience, so interoperability with legacy displays and getting rid of a power cord will be a big deal. They could care less about a $0.40 royalty or the virtues of micropackets. Hopefully, DisplayPort will get traction in the handset market.