The sensor size of both the cameras are almost the same.
1000D: APS-C 22.2x14.8mm
60D: APS-C 22.3x14.9mm
I can't switch to a Nikon because I have already purchased two Cannon EF-S lenses. I shoot mostly products. So, faster focus really doesn't help. Would the 60D expose a picture better than the 1000D. Should I wait a year for Cannon to bring out a larger sensor with the capacity to use EF-S lenses?. Please give me your opinion.
but for products I don't think it would be of much use, unless you plan to shoot Videos in future which 60D can do but 1000D cant do.
If you are gonna use 60D just like the 1000D then I would suggest not to go for it. In that case, for betterment, you can go for the 550D/600D or the Nikon D5100 which costs around 30s. All these provide great quality images and neat videos.