Camping is split - people who want to carry their stuff and people who don't. As such, comfort is subjective depending on whether you mean "can bring a small jacuzzi along to relax in" versus "don't have to carry said jacuzzi up the side of a mountain".
I class "proper" camping as that you could hike with all your equipment and then set up camp using only that. As such, a box projector and a sheet would be the qualifying criteria for that, whereas a car / stereo system / fridge / etc. would not. Proper camping also means you can set up a camp at any time, anywhere, should the weather turn on you.
Anything else is a "camping holiday" which means not being able to afford a proper hotel so staying in a caravan/tent but bringing a car load of stuff.
Both have their place and their own comforts (hint: If you're uncomfortable when camping, you're doing something wrong... whether that's temperature, location, water penetration, food, sleeping arrangements, etc. it means you're in the wrong place, brought the wrong equipment or shouldn't be trying to camp in the first place because of some medical condition).
But a plain white sheet and a small box, or a smartphone, hell even a laptop, and even a solar panel are quite within the definition of proper camping too. Smartphones especially. If nothing else they are an ideal backup compass/GPS even if not perfect, emergency communication tool, maybe even a reference tool (put that book about first aid and skinning rabbits on there, or try to ID that mushroom), as well as entertainment. If there's more than one of you, a smartphone and a projector to truly enjoy the evenings (darkness is quite limiting) is fine - hell, aim it at the floor of the tent and it'll do an okay job and is a damn sight less fragile than some LCD panel. Hell, I've lugged telescopes around, and model rockets, and all kinds. A decent rucksack can easily hold a tent, appropriate bedding (including a double sleeping bag), pots, pans, food, clothes, gadgets, radios, books, etc. plus certain backups of those and still have room to spare for completely luxury items like this and even room for batteries and panels enough to keep things charged.