I suspect your "Location" says it all, however...
In one sense it would be a good thing because it would allow those with 4100's to be able to put larger drives in, and many people have wanted that.
But, in another sense, it is almost a waste. Why? Because I had several 4000's with 1 TB in them and it drove me nuts. Go ahead, try moving say 200 or 300 GB of data over 100baseT. Hell with that! I supose if you wanted it just for say an MP3 Library, you would only have to do the l-o-n-g transfer once, but it would still stink IMO.
To each their own, but this is why I have Guardian units.