Yes, I saw and heard the new HR-X table last Thursday at the show. Harry was very excited about the table. I doubt the older TNT's would be upgradeable - totally different plinth, platter, motor. The air suspension, SDS, JMW tonearm remain the same.
As for the sound, it was difficult to honestly make a comparison with the Hot Rod. Yes, it sounded great but so does the Hot Rod.
It is probably similar to purchasing a Mercedes Benz for example - this years model is gorgeous but of course a better car will replace it in a year or two.