The last PC is the last personal computer based on the original IBM PC architecture of 1981.

As Internet and World Wide Web and VoIP services have evolved to subsume the functions of the desktop computer, and other devices such as wearable PCs and video cell phones have emerged, it's becoming less and less necessary to care about the underlying hardware or to seek to expand it. PCs have become disposable, especially laptops. A mature computer industry has begun to develop, with extremely solid and standard interfaces and commodity part types.

The last PC is a theoretical endpoint, a device like a fridge or television that it is simply pointless to replace, and which can be upgraded simply by installing things in it that could fit in a number of other types of devices. When one is no longer concerned about the differences between the PC, the TV and the toaster, all having USB or DVI ports, arguably, one is no longer using a PC at all, but rather a home automation or home theatre network.

Such networks based on the BACnet standard and likely non-Microsoft OS like Linux or eCos are emerging as of 2005-10 and will be likely to put the PC in its place as just a control terminal for the HDTV office or HDTV home theatre.

The Efficient Civics Guild expects this to occur no later than 2012, with reliable one thousand dollar PCs exhibiting most of the necessary integration capabilities by 2008 and reliable one hundred dollar PCs doing so by 2010. To facilitate all of the integration and work out kinks or disputes, e.g. HDDVD discs, DVI connectors, to achieve one standard worldwide, will take approximately the two years from 2010-2012. While wearable PCs may continue to evolve they will do so not in accordance with HDTV office specification but with others much more related to exercise, navigation,biofeedback and primary health care. This device has a different name: the Very Personal Computer.

According to geeks, by Mayan calendar, the world must end in 2012, since it simply cannot exist without lots of geeks being paid to connect obscure connectors and make up obscure "reasons why" you "have to upgrade". At least, the geek world cannot so exist.