Seems to me that dell is going backwards with their inspiron line with the exception of the 9300.
The 6000 IMO was a backwards step from the 8600 coming with a half as grunty vcard,no swapable media bay,i don't know why dell thinks home users will not want a second hard drive or battery,the I6000 wxga I ordered for my sister has very poor viewing angles compared to my M70 or my old I8600 although has a lot better built chassis compared to the I8600.
This I630 or XPS140 seems pretty much along the same lines,as a replacement for the 600m,a better body but with one big glaring ommission,lesser graphics.
I for one would find a comparable system to the sony S360 or whatever its replacement is now,very appealing.
Dell used to put on their website that the inspiron line was for multimedia and gaming but it seems now,with the exception of the 9300,you are better off buying the latitude range
Inspiron 630 = integrated graphics
Latitude D610 = MR X300
inspiron 6000 = MR X300
Latitude D810 = MR X600 or 300