Edit - just looked into lightroom - more of a database management tool than editing tool...
Not really. I've lived in photoshop all my working life (since 1996), but now only 1 in 100 photos touches it.
Lightroom handles everything except physical re-arrangement of the image. i.e. if you wanted to clone something out, go to photoshop. If you want to stretch the left-hand side while leaving the right intact, go to photoshop.
But all the cropping, straightening, white balance, curves, colour, B&W conversions, sharpening, noise-reduction, vignetting, etc all gets done in Lightroom.
The magic lies in a couple of things.
1) RAW and JPEG get treated the same, no extra conversion process involved. Edit iPhone photos alongside DSLR images.
2) The original images are always intact, the changes are stored in a database and can be applied to or removed from as many images as you like.
3) Batch processes like exporting, printing, applying presets, etc is all really well supported.
I used to find taking photos slightly annoying, because of all the post-processing that was required. Everytime I filled a memory card, I'd dread the number of hours needed at the computer. That dread is totally gone now with Lightroom.