Traditionally, all-in-one mobos were damn near impossible to upgrade, as the integrated features couldn't be disabled, and they often had few or no standard expansion slots. These were the bane of my life when I worked freelance tech-support as a teenager; endless godawful Packard Bell or Compaq machines with no future, and earnest owners asking me how they could upgrade them. Erk.

These days, things aren't so grim, as integrated features can generally be disabled through jumpers or BIOS settings. Intel chose to add integrated graphics to their standard motherboard chipsets a while ago, and their current baby, the Intel 815e chipset, contains options for integrated graphics, sound and LAN capability, all capable of being disabled via the BIOS. With the integrated features disabled, it's a phenomenal power-platform for a nice big Pentium 3 Coppermine system, which means that integrated cheapo systems bundled with this mobo have vast upgrade potential.

One other thing not mentioned in this node is how small all-in-one systems can be. A English student on my corridor has a small Cyrix based box, roughly the size of a hardback book, far smaller than a laptop. It's impossible to upgrade, with everything integrated and no expansion slots, but it's fairly impressive anyway.