I don't understand what the fuss is about. The question "Are we on the verge of or in an era of equivalence of sound of the recorded real orchestra and a recorded MIDI sampled orchestra?" does not have a yes or no answer as such.
1) To whose ears?
2a) Are we talking equivalence between the best orchestra in the world with the best conductor and this library and the best programmer? Then, apologies everyone, the answer is "Not in your dreams", yet... Whether it's possible in the future or not we shall see. However, a great orchestra employs great musicians who collectively know their instruments incomparably better than a programmer does, and if the piece is a good one (well-written) they will collectively perform it much more poly-dimensionally than a programmer will, even if he's the composer in most cases. If the piece is - intentionally or not - unplayable for whatever reasons by real musicians, then the sampled performance will tower over the Concertgebouw's, Berlin's etc. IF that's your thing.
2b) Are we talking equivalence between your average community orchestra and their conductor in residence against the VSL and say, Jay Bacal? Then the answer is still "Not in your dreams", in favour of the VSL this time.
How many of us here (the ones that are literate in music-writing and don't just sequence sounds) would sit in front of the computer for days on end twisting knobs, tap whole novels in morse on the mouse, etc. if money was no object and we could have the London Philharmonic assembled in front of us on a whim, ready to workshop every sketch, every experiment, anything really, everlastingly, tirelessly, patiently...
But LPO is not available to us is it? Not even our regional orchestras are most of the time. Hence, we use our computers with the best available tools to us, to the best of our individual ability, to get orchestral sounding renditions of our works for us and our employers. So, what exactly is your question Mr. Beatty? Are you a director/producer wanting to know whether paying real musicians is a waste of money because there are computerized libraries around these days? If that is the question really, the answer is "pay real musicians" if you can get good ones. If your interest is purely academic, it's time for me to sign out.
Best wishes.