@Setanta,
I thought that as well, but on the plus side, it looks as if they are all actually playing their instruments, as opposed to miming a backing track.
John's stance was well done, I thought, and Ringo did the head shake perfectly, even though he did it a little too frequently.
I suppose they have to emphasisie those bits, as it all helps the nostalgia kick.
I bet it's a good night out, though. I might go so far as to treat the better half to a ringside seat, as long as she doesn't expect a meal afterwards.