The Epson 3200 is not as resolving as the Dualscan 3 despite its 3200dpi vs 2800dpi rating as it is a flatbed design. I doubt the 4870 will have any real resolution increase even with its 4800dpi rating. Thus, just like the Epson 3200, it will likely perform well for 35mm but will really shine when used for medium and large format.
However, the 3200 does perform relatively well in terms of colour and dynamic range. The 4870 promises to improve that dynamic range yet.
Apart from the old Acer Scanwit, the Epson 4870 will be the cheapest scanner with ICE when launched. Anyone who does intensive scanning will recognize the value of ICE in reducing your post processing efforts.
However, the 3200 does perform relatively well in terms of colour and dynamic range. The 4870 promises to improve that dynamic range yet.
Apart from the old Acer Scanwit, the Epson 4870 will be the cheapest scanner with ICE when launched. Anyone who does intensive scanning will recognize the value of ICE in reducing your post processing efforts.