What Two features could make Next Gen. MD Play Only Units Be Really Succesful.

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I think if Sony makes another generation of MD play only units to replace the EH50 and EH70, they should take a que from the new S700 series. A great way to market another generation of play only units is to have built in noise cancellation as the new Network Walkmans do. It will be a great way to differentiate and give reason for people to buy the play only units instead of (or in addition to) a recorder/deck with these "playback oriented" features. I mean all it really requires is a special headphone jack and I guess a special remote with the special jacks on both ends (like a modified 35ELK or something) in order to use the noise cancelling features but you would still be able to use a standard remote/headphones with it as seen by the jack on the S700. And to go even further, instead of having a stupid add on like the S700, they should have a Bluetooth A2DP transmitter built in to the unit that you can turn on and off so you could use it with Bluetooth headphones/speakers/stereos (like the ones Sony is just releasing). Sorry, but if they made a new series of MD play only units like that, with the high end model having those features, I'm sure almost everyone from here will jump on it, as well as relativly killer sales from the Japanese domestic market and offshore exporters like Audiocubes. Are you listening Sony?