I very much doubt Lockhart can do 1X BC if it has a 4 TFLOPs GPU. I've never seen anything remotely suggesting that Navi has 50% higher IPC than Polaris, let alone the fact that emulating something with higher theoretical throughput shouldn't really be possible unless the XBoneX is seriously underutilized (doubtful).
If it's still coming, Lockhart is a new-gen console that plays new-gen titles at 1080p, with decent XBone emulation where it perhaps runs its games in boost mode with increased framerates.
And since this is the baseless rumors thread, nothing like your typical unknown website (probably) trying to get a viewer and patreon increase by throwing off baseless rumors:
aaaand.. it comes from pastebin.