Woah, wait? Eshop access on 4.5?
No, basically you are mirroring your nand to sd card, gateway mode booting to it then updating it, from the looks of it, it has online as needs it to update and eshop, since they are booting to the emunand they obviously have full control, meaning via emulation they can patch in stuff, they dont need an entry point as they are already in, But hopefully there end goal is to have latest firmware having all the patches ported and applied for full rom support via the emunand, possibly even allowing retail cartridges.. Although means dont need actual gateway for that feature..
In the vid, Monster Hunter would have just been running in 4.5, not emunand, they would have added to launcher whats needed for the AP patch