This may be true of some models but the 10bit Sony LCDs are actually true 10 bit panels. This applies both to the D3000 and the new X3000 and X3500 models, I'd need to check the SPEC of the others. Other manufacturers may also have 10bit panels, I don't have that information.

The information that you have shown was probably correct 6-8 months ago but possibly need updating in the light of the recent models that have come on sale.