Why do so many movies feature the Dell Rugged laptop?

Usually when you see such an obvious product in a movie or TV show it's a product placement. This is when a company pays the filmmaker to include their product in the movie or TV show.

Product placement, also known as embedded marketing, is a marketing technique where references to specific brands or products are incorporated into another work, such as a film or television program, with specific promotional intent.

It can make some scenes more realistic than having obviously made-up products like soft drinks and cereal boxes. Or, if done poorly, it can look ridiculous, or even bizarre.

A great example of pushback to product placement is the movie Repo Man where all of the food products are generic with white labels and black type on them. The beer is simply labeled "Beer" with no branding whatsoever, for example. I think at one point there may have even been cans simply labeled, "Food", if I recall correctly.