Outside the US the HT2050 is called the W1110. It was recently announced that the W1110 is being replaced by the W1120. Not sure what the HT2050 replacement name is.
The most obvious differences between the W1120 and W1110 that I see are that the W1120 gets the faster 16 ms low input lagtime for gaming as previously on the HT2150ST and upgraded internal sound with stereo speakers as previously on the HT3050. I would hope the new model will have at least slightly improved performance in other areas as well, but who knows?