HDTV stories

These days, it's all about the PlayStation 3. Sales are up for Sony, Gran Turismo 5 is finally available after five years of development, 3D games are looking riper and possibly holographics are in the works. What about the PlayStation 2? It's getting integrated into an HDTV.
How large does an HDTV need to get before it's considered too big to be labeled portable? Personally, I'd say the sweet spot for a portable tube would be no larger than 19-inches (diagonal). Toshiba, makers of all things non-mainstream is introducing a new line of battery-operated HDTVs.