The limitations of the Technology Preview are not likely to change. We still hope to provide a free version upon final release as well and the limitations of that version may be different, but we do feel that the greatly increased capability and quality of TG2 compared to TG 0.9 means you are getting at least as much detail as TG 0.9 even at the lesser 800x600 resolution.
One factor in this is the well known need to "downsample" TG 0.9 renders for best quality. TG2's detail slider at a setting of 1 is largely equivalent to the quality level of a downsampled TG 0.9 render. With TG 0.9 free version limited to a 1280x960 render size, if you downsampled 2x you would only have an image of 640x480. So if you consider equivalent quality the Technology Preview actually offers you a better mix of resolution and detail.
- Oshyan