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My first reaction to the specs:

Pros:

+ USB 3: Very nice! Finally a pocket-sized, fast USB host.

+ Dual HDMI: Could be useful as a projector computer.

+ 1.5 GHz: Good, it might be fast enough for some real work.

+ Gigabit Ethernet: Excellent for those using it as a NAS.

+ USB-C for power: Not surprising, it's the standard now.

Cons:

- MicroHDMI: Incompatible with the 800x480 HDMI 3.5" screen [1]. Also different again to the MiniHDMI on the Pi Zero (will there be a new Pi Zero soon? Who knows.)

- Power consumption! They recommend a 15W power supply, which means I'm pretty sure this won't run on batteries.

[1] https://www.aliexpress.com/item/New-3-5-inch-800x480-IPS-LCD...

My Intel laptop uses 45W and it doesn't have dual 4K hdmi support.

15W is crazy low for what it is offering.

Depends on the batteries, probably...

But certainly, this is not a device for a shoestring power supply. Not a Wattage-Guzzler either.

I don't have one to test with, but I suspect that if you replace the hard U joint HDMI "cable" with a short microhdmi<->HDMI cable the display will continue to work just fine.
15W is basically 5V * 3A, there's plenty of PSUs that offer that and more, even some of the phone chargers. My 30K mAh powerbank offers a 6A output, so there shouldn't be any problems with running RPi on batts.
Finally Ethernet is not throttled through usb2