I was hiking about the Valley floor yesterday. It is pretty warm, comparatively, so much of the last storm's snow must have melted. Very little snow on the floor, but the higher rim does have some snow. The ranger told me you could do the Four Mile Trail, and it looked O.K. I'd even say Half Dome Trail was good from what I could see.
They have built a official detour to start on the Muir Trail. Follow the road signs to "trailhead" about Camp Curry, and you are led to a dirt parking lot. The "detour" trail goes up the right side of the Merced River, probably the former Horse trail. You go past the huge water tank, and then, presumably, the trail connects with the original Muir Trail further up. I just went to the Vernal Falls Bridge, which is being rebuilt.
There are some fall colors to enjoy, and it will be chilly in the shade. Aside from the cables being down, Half Dome might be a great hike. Clouds Rest has a good covering of snow on it's northern side. North Dome looked good for a hike. The Snow Creek trail is good up pretty high, at least, and you get unusual perspectives of Half Dome from there. Maybe more snow will melt higher up by this weekend.
Have a nice hike!