SHIELD is a grand experiment to integrate various elements of NVIDIA's product stack into a single cohesive device that transcends previous handheld gaming devices. It does this by integrating ecosystems from Android, the PC and online HD streaming in new and interesting ways.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips