1024x768 is actually probably the most common resolution for cost effective projectors, it's only low res if you have true high res sources.
Be careful with the short throw projectors like that Sanyo or the
NEC WT610E, they can be very useful but they have no optical
zoom, image shift,
etc., so they have to be a a very specific location relative to the screen both vertically and horizontally in order to get a specific image size. In addition, they are relatively low output (2,000 lumens for both models noted) and limited in the image size recommended (60"-80" diagonal for the Sanyo and 40"-100" diagonal for the NEC). So a great solution for some applications but rather limited in the range of proper applications.
I think the best demo of short throw I saw was the NEC WT model combined with a dual bounce mirror system that was shown at InfoComm a year or two ago and that resulted in a 100" image in about 3' of depth.