I am also pretty sure that the reduction will not be that great, more a leveling off. IMO, HDTV's are following the personal computer model with new technology and manufacturing productivity increases driving new enhancements and lower prices. I believe the combination will lead to people having more than 1 HDTV and result in their more frequent replacement.

I think we will see companies pushing the envelope to justify higher prices and margins. Some of the features that I think will get built into top of the lines sets will include the following:

1) DVR technology - With retail storage prices below $100 for a terabit of storage, it would not surprise me to see a struggling company like TIVO agree to do this.

2) Internet connectivity - With support multiple download services.

3) Higher resolutions - possibly starting at 2160p

I see all of these eventually being driven down into mid-market HDTVs just like 1080 has been.
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Living Room 24x18 open 1/2 flight up to a raised dining room/hall 24x12
Outlaw 976 pre-pro running 5.1 system
Outlaw 750 for Artison Masterpiece LCR and 2 NHT SuperZeros rears
Velodyne Servo FX-1200
LG OLED65C8PUA via HDMI2 to/from 976 HDMI ARC
Roku Ultra
Samsung BD-D5500 BluRay
Amazon FireStick 4K to 976 Aux HDMI input for Amazon Music Ultra