Is a 100-inch TV too big for a normal living room?

It depends on seating distance. Plan for roughly 10 to 14 feet between the couch and the screen so the whole picture fits comfortably. Smaller rooms will feel dominated by it.

How does it compare with Samsung's flagship Neo QLED TVs?

It shares the Neo QLED backlight and 4K panel but sits below the top 8K and flagship 4K models in peak brightness and anti-glare treatment. You pay mostly for the 100-inch size rather than the best picture Samsung makes.

Does it support wall mounting?

Yes, but the set is heavy and large, so use a mount rated for its weight and anchor it into studs or a reinforced wall. Professional installation is worth considering.

What can I watch on it?

It runs Samsung's smart TV platform with the major streaming apps, plus tuner and HDMI inputs for cable boxes and consoles. It upscales HD content to 4K, though native 4K sources look best.

Is it good for gaming?

It handles consoles at 4K, but check the rated refresh rate and HDMI features for your console before buying. A screen this size makes gaming immersive if your room allows the distance.