Yea I go to the grandstand show every year and although they reuse some acts it's still a good time. Highly recommended if you haven't seen it yet.
Rundown of this years show(dont highlight if you want to keep the new addition a surprise):
the young canadians dancing and singing as usual
native dances
a ventriloquist (Ronn Lucas here's part of his act: http://www.youtube.com/watch?v=GyTGwflaNx0
some guy with a yoyo type thing
a guy that does acrobatic stuff(i guess?) in the air hanging onto a long sheet of fabric
and new to the show, some motorcycle stunts which were easily the highlight of the show along with the fire works.