Yes, you can opt for stationary seating at several attractions. Then you are pretty much just watching a 3-D movie, like for Minions.
We also have not yet mentioned the many Universal gift shops. Some are not that exciting, but some are very neat. There's an art store near the talking fountain. The fountain only talks certain part of the day, but it is a hoot when it does. teh art shop is not at all theme park themed, it sells local artists' work. There's also a neat prop shop over by the monhter's make-up show that has very unique merchandise. It is easy to walk right past it, and many of the other little gist shops, so DO take time to look carefully. The merchandise in the prop shop changes, so I can't say exactly what wll be there on your visit.
City walk also has some fun shops. The Piq! shop and the Chocolate Emporium come to mind.
If you like Dr Seuss at all, then the whole land is fun to see and explore. It is just full of Seuss references and unique landscaping. Even if you don't go on the One Fish ride, the song is cute, and it is kind of fun to watch others dodge the little water jets for a bit.
The Universal hotels are also nice to explore. Portofino used to have nightly singers- I'm not sure if they still have them. The Hard Rock has all kind of live music events. Sapphire Falls is also very pretty, and a nice place to eat and explore. All have shops.