That was january 2005.
Today Broadcom offers HDTV-on-a-chip for $30. That includes almost all you need to receive, decode and display a HDTV stream (including full HD-DVD/BluRay support).
So while Toshiba might want to be leading edge technologically they also want to turn a profit, and here cutting cost on the BOM is essential.
Cheers
And Cell costs how much? $40? plus SCT chip $25? and together they will do things like decode/scale several streams and display them as thumbs on the screen, instant replay, provide on screen and bluetooth control programability, ethernet connectivity etc. (plus the possibility of things like web browser, hard drive connectivity for Tivo functionality etc). When you pay $1500 for a high end HDTV, I can see how the extra $35 might be a dealbreaker.