In addition to the above comments, I'll offer some advice from a former professor in regards to presenting retail designs: Show more people. Your client does not want to spend a fortune developing a project only to see it empty.
Are you making that texture from scratch? Or are you trying to make a seamless texture from a photo?
On creating a seamless texture in PS: http://www.photoshoptextures.com/texture-tutorials/seamless-textures.htm
Or maybe you could try this: http://www.bricksntiles.com/
