VH and Roth were great back in the day, but I don't think it's going to be quite the same now that they are all in their 50s. Roth's voice is a shell of what it once was.
Buddy of mine went to see Roth and Hagar on their combined tour a couple of years ago. He said that Sammy hadn't lost a step (and actually, was better than with VH). Also said that Roth sucked. Not only did he sound terrible, but he forgot the words to one of the songs.