Efforts have been made to use actual console hardware for many older systems, though.
Atari 2600 homebrew developers use various methods, for example, burning an EEPROM to plug into a custom cartridge board or audio transfer via the Starpath Supercharger.
Saved persistent state is lost, excluding Untitled documents.
We expected to see a firmware update bundled with Super Mario Galaxy 2, but found no such thing — however, a few weeks later, we have ourselves a brand new 4.3 update. every update in the past 2 years, except for the 4.0 update (which actually added some features).
As usual, Nintendo describes the update as: June 21, 2010 Wii Menu 4.3 Unauthorized Modifications Because unauthorized channels or firmware may impair game play or the Wii console, updating to Wii Menu version 4.3 will check for and automatically remove such unauthorized files. The only thing that will drive people to install this update will be the broken Shopping channel and hypothetical future games which will come with this update on disc.
The Homebrew Channel is a self-updating homebrew application loader by Team Twiizers which allows users to load homebrew applications without having to run an exploit every time.
Once installed, users can access the channel from the Wii System Menu just like any other Wii channel.
Assuming that the Twilight Hack, Bannerbomb, Smash Stack, or Indiana Pwns is already setup on your Wii; The installation should be automatic from this point on, and your Wii will reboot.