This can provide excellent texturing quality. The purpose was to find optimal texture tile settings to use for terrain texture tiles. There was some valuable input which I have summarised here for those interested.
Tiling can result in visible seams where the tiles meet.
Apparently, if you have an appropriate graphics card the current DirectX and OpenGL drivers for newer graphics boards automatically blend the edges of the pixels. It may reduce the size to the max the graphics hardware can handle depending on the limitations of that hardware. Contact 4.2 texture resizing no fixed limitations. It quesries hardware to determine limitations. I.E. doesn't unload textures.