I agree completely and we should blame Nintendo for the Nintendo Switch.
Speaking about Thunderbolt via USB-C it is incredible to sit in my work desk, connect a single cable to the notebook and suddenly having a desktop computer with three external monitors, keyboard, mouse, and many other ports. I have not tried an eGPU yet but will be happier if thunderbolt evolves faster and gives more extensibility options to notebooks. I cannot forget to mention that another USB-C dongle that I use can also be connected to the mobile phone and converting the mobile phone into another desktop computer with mouse, keyboard, and an external monitor. Before USB-C and Thunderbolt you should acquire specific dongles for specific devices.
Until they manage to get Ethernet through that cable without a converter - it's no bueno.
As for an eGPU user - the issue with eGPU is the cost of setup, but Thunderbolt docks are also stupid expensive(above $200 for one). I built my eGPU setup for $350(PowerColor+RX550), as a good Thunderbolt dock is in the range of $300.
Speaking about Thunderbolt via USB-C it is incredible to sit in my work desk, connect a single cable to the notebook and suddenly having a desktop computer with three external monitors, keyboard, mouse, and many other ports. I have not tried an eGPU yet but will be happier if thunderbolt evolves faster and gives more extensibility options to notebooks. I cannot forget to mention that another USB-C dongle that I use can also be connected to the mobile phone and converting the mobile phone into another desktop computer with mouse, keyboard, and an external monitor. Before USB-C and Thunderbolt you should acquire specific dongles for specific devices.