Originally Posted by Morpheo
Yes it is, the fact that TVs deinterlace doesn't mean they do it well either. Some of them yes I'm sure, but some of them no. In that case, it's better to let the player take care of the deinterlacing, and sending 1080p directly to the TV.
Of course, with an A30 or A35 the player doesn't do any deinterlacing - it simply plays back the native 1080p content.
The biggest issue of course is that if your TV isn't 24hz capable (120hz for example) you are going to be "creating" extra data as the player does 3:2 to make 60fps from the native 24. This can make unscreen motion rough looking, a problem commonly referred to as 'judder'.
Some players judder worse than others, of course. The biggest problem with judder is, in my opinion, the same as the 'rainbow' problem on DLP's or banding issues on LCD displays - most people never notice these issues, but once you do, you always do and it drives you insane.