As a semi-nerd, I find this post deceiving.
When were the three features you mention ever key selling points for the PB? AC3 will most likely never happen, as it's a Dolby proprietary format requiring licence. DNLA, let's hope so, but I didn't buy my PB because it had DNLA, and was never represented as such. USB OTG - I concede that this would have it's uses in the field as many have said before, so let's hope that it comes.
Key selling points? Not in the brochures, unboxings, reviews, and everything else I read before making my purchase...