Actually, on their web site Jinke do say the display is plastic:
http://www.jinke.com.cn/Compagesql/E...tail.asp?id=36
If the images they show are anything like the actual device, it may be somewhat better than the V3 in terms of controls - larger page turn buttons (though I do not understand why forward and back buttons are treated with the same importance) and also a 5 way navigator - that has got to make menus easier to work with.
No SDHC support.