As the name implies, desktop replacements are optimized to replace your desktop. These laptops are most often sought by gamers and heavy multimedia users who need a high-performance computer.
Desktop replacements have a multitude of ports, speed and power that rival many desktops. Screen sizes are typically 17 inches or larger.
This power and performance comes at the expense of portability and cost, though. Desktop replacements typically weigh in at over 8 pounds with some of them topping out around 15 pounds, making them poorly suited for travel. Prices tend to start around $700 and can reach in excess of $2000.
Still, if a powerful laptop is your primary concern and you really only intend to move it around the rooms of your home, then a desktop replacement may be right for you.