An interesting development in my opinion for any 3d content creator/VFX/animation that want to work in mobility but also having the possibility to switch on a more powerful GPU respect what is available on a laptop, or repower a less powerful laptop, or just upgrade a GPU in the future.
Razer Core (I'n not a Razer customer) need a TB3/USBC port and any modern GPU, of course the laptop BIOS need to support this option to work plug and play (AMD just add eGPU support in their drivers), but even without that PROBABLY will be possible to use it in any case. It's not cheap but doing a couple of sum in my opinion it's still good if you count you currently need to change laptop to change the discrete GPU.
All other eGPU enclosures on the market (i.e. Alienware Gaphics Amplifier) are using custom connectors so can be used only with some specific laptop models or brand, or are unofficial DIY setup (myself using one of them).