This is a great start, the OneXGPU is ridiculously overpriced for a 7600xt mobile GPU. This one is a little more down to earth. For contrast, for $750 you can put together an eGPU that can do either Oculink or USB 4/Thunderbolt (but not both) with a 7900GRE. It won't be as portable, but for the intended use, I don't really care about it being super portable, the Radeon 780m iGPU that is in most current Oculink devices is still capable of gaming in a pinch one on the road.
I don't really see a use case for gaming on the road with an external monitor, if I'm not at home I am going to want to play on the monitor built into my device and if I'm at home I don't really care if my eGPU is the size of a Razor Core X and doesn't fit in a laptop bag.
I still think these need to come down to around $300 to catch on at this performance level. Also, you can buy a laptop with a 4060 or even a 4070 built in for less dough than one of these plus a laptop.