Re: What a joke
No one will want to call it Lightning because it isn't Lightning. Nor is 'LightPeak' a suitable name for it.
It is USB-C. USB-C is a standard which covers the physical connector, power handling, and communicating which 'alternate mode' (i.e Thunderbolt, HDMI, DisplayPort, MHL etc) it is to use. Thunderbolt, an Intel technology, is a way of having PCIe kit outside of your laptop, and reduces I/O bottlenecks for some workflows. Not all USB-C kit and cables are capable of all the features and power delivery that USB-C can support.
Like you, I don't immediately need the kit. However, the people wanting 32GB RAM and very fast SSDs are often the same folk who want to get data in and out of their machine very quickly. I'm more CAD than video, so don't need to shunt video around - but the idea of external GPUs is enticing for me.
It's also worth noting that a large, fast SSD inside a machine with slow I/O is harder to keep backed up.