I travel a lot globally, and would love to have both wifi and 4G/LTE available in this form factor. Would also be great at home if the comcast goes down, which we all know it does constantly anyway
"Performance Base" equivalent
While I recognize that the processor is a bit "underpowered" in order to achieve a fanless design, it should be feasible to couple with a GTX 1050 Ti and provide decent low-end gaming+workstation capabilities. Couple with an extra 48Whr battery and you could easily take on the recently released Dell lineup with their 1050s.
OLEDs are gorgeous. I know they also tend to take more power, so this is more of a "nice to have" for me -- but the black levels are amazing as is the color reproduction. For a machine just begging to be used as a portable multimedia device, this would be awesome.
Matching external thunderbolt monitors
As I mentioned above, I travel a lot. I'm also a sw engineer, and multiple screens is something I really miss from my desktop setup. Theoretically, you should be able to daisychain and power two thunderbolt displays off the TB 3.0 port on the Eve. Having a design and kickstand setup that matches the Eve would be great, and having matching display performance would be /fantastic/. Currently the best out there is ASUS's crappy USB-C 1080p monitor. Eve could kick their pants.
Second M.2 4x Slot
Would love to be able to toss in a second drive. I have lots of NVMe drives laying around, and the ability to put in a second one to run Linux off of would be great.