There was a point in time when NVIDIA was at least considering the release of a second generation SHIELD Portable device. We know this because a filing with the Federal Communications Commission (FCC) that is stuffed with pictures has been made public. NVIDIA submitted the filing around the middle of last year with a short-term confidentiality

Source: Hot Hardware – NVIDIA SHIELD Portable 2 Breaks Cover In FCC Filing With Pics And A Full Teardown