I worked in advertising. I've never really liked the practice of showing someone else's product in an ad. It's like free advertising for them (in this case, Apple).
Look at a couple really successful ad campaigns for Apple:
1. 1984. Didn't show a PC, but showed PC users as miserable drones.
2. "I'm a Mac, I'm a PC". Didn't show a PC, but represented a PC user as being an uncool business type.
In this ad for a Microsoft product, we are seeing a MacBook Air...