I don't know if I agree that RP's are on the way out. DLP and LCOS are pretty decent technologies that are becoming extremely cheap. I think they'll be around for a long time to come as a cheap alternative to flat panel.
Also, personally I'm more interested in LCDs... Now that 50' LCD flat panels are a reality, I'm hoping 60' to 70' are on the way (that would be my next upgrade)
LC60E77UN, 8300HD+HDD, TX-SR876, TSS1200, PS3, Xbox360, DVP642, H880
LC46D62U, 8300HD+HDD, HT-TQ85, Wii, HOne