The AE100 is a WVGA -wide VGA 16:9 panel running at 856x480. DVD resolution is 720x480 16:9. So for DVD viewing the AE100 matches very closely in resolutions... the vertical resolution being equal. No scaling is required vertically for DVD's on a AE100.
A XGA panel playing DVD's runs 75% of the panel in 16:9 resulting in a 1024x576 matrix. Scaling is required to get DVD's 480 line vertical resolution up to 576. Because the XGA panel is only running 75% of it's resolution, lumen also drops to 75%. In other words, a 1000 lumen XGA FP running 16:9 DVD will output 750 lumen. An AE100 will look bad downscaling 1024x768... it is fine for 640x480.
So, if you do lots of 4:3 viewing (PC, cable TV, VCR...) then an AE100 is not a good fit. If you are like myself that does DVD viewing and some video gaming, and want a 16:9 panel, then the AE100 is the cheapest 16:9 solution currently available. Depends on what you view.