I predict that the key will have:

1) Read-only install section, so that, no matter what else is done with the key, you can *always* do a basic install. Can boot Windows off of it, while referencing boot info from this section, the main section, or hard drive(s). (Useful if you have *completely* hooped your installed version of Windows.)

2) Slipstreaming section which is referenced during installation/repairs. Any updates are automatically stored here as they are downloaded. When installing/repairing, updates, drivers, and/or compliant software can be individually selected.

3) Readyboost/Standard file storage section, offering secured, per-user profile syncing, so that you can log into *your* account on /any/ computer that you plug the key into. Many programs can also be installed in this section, with temporary registry entries added when, and only for as long as, a program is run on a 'virgin' system.