The ZBOX QTG7A4500 has debuted as a machine that, as its maker ZOTAC implies, acts as a cross between a mini-PC and an enterprise-ready workstation. With a height of 62.2mm (or 2.45 inches) and a 2.65 liter (l) chassis, it might indeed bring improved portability to the latter use-case.
The new ZBOX Q-series device actually has a majority of specs (and a cooling method) in common with the new VR GO 4.0, although its HDMI port-count increases to 2, its type-C port is more overtly associated with the Thunderbolt 4 standard (albeit for data only) and its RAM can be maxed out to 64GB.
Therefore, it could make for a quad-display set-up as opposed to 3 with the VR G0 4.0, although both specific-use-case PCs support Wi-Fi 6 and Bluetooth 5.2, as well as an enhanced potential to go anywhere with their owners.
Furthermore, the QTG7A4500 substitutes a 512GB SSD out of the box for 2 free M.2 slots, 1 with PCIe 4.0 x4 and the other with PCIe 3.0 x4 and Intel Optane support. It also comes with dual Wi-Fi antennae, although ZOTAC has yet to furnish it with pricing or release information at this time.
Source(s)
ZOTAC Press Release