Well the actual micro-display technology is clearly licensed from Sony, otherwise they would never call it SXRD. More interesting will be pricing. LG is a up and coming player in this market but when it comes to displays they don't have Sony's brand recognition or ability to command a premium. Given the pricing of Sony's current PJs, (except for the VW200) I would say these might liven up the FP market if they provide competing technologies at lower prices or any kind of innovation in other aspects of implementation over the Sony competition.
Another player in the HT FP maket is always welcome in my book - hope they make life more interesting for us all.