"I would love an overview." 

Xan launches into an explanation of the basics of Kryptonian technology!

As he mentioned earlier, they relied heavily on island of stability elements for power and exotic effects. Krypton had deposits natively, but with a sufficiently powerful particle accelerator they can be home-grown. There are other potential power sources, though, from other galactic civilizations Jor-El had observed, some of which have less onerous requirements; they won't be making a Body-Mold or a stasis chamber any time soon, since those need the island of stability's weirder properties, but they can make some very nice things.

Kryptonian consumer electronics often had a holographic (or, in the higher-end cases, telepathic) interface, and served many functions. There's one device Xan is particularly excited to see implemented, which sounds like a cross between a phone, a personal computer, and a 3D printer. It straps to the user's off-hand, and projects a sort of holographic glove as its command interface.

As Xan expounds, Lex's face grows more and more interested. 

"I'm glad your Jor-El was more forthcoming than ours," he says when Xan's finished. "I can get a team of engineers ready within the hour. How do you want to tell them you know all this?"

"I can pretend to be an unreasonably lucky human," he says. "Touched a mysterious crystal, schematics seared themselves into my brain, the crystal broke? A Kryptonian-oriented telepathic interface presented with a human nervous system might actually do that, oversell the data and fry itself. It'd probably overwrite half of the human's episodic memory in the process, but they don't need to know that."

"Wouldn't be the first time something wacky happened to someone who came in contact with--well, something weird, they don't know about Krypton qua Krypton." 

"That... is good to know. Should they continue not knowing about Krypton, in particular as the source of this tech."

"It'd probably be fine, previously the only way to explain that Krypton existed would have ended with 'and I know this because I am a space alien' but if we're blaming it on a rock then that doesn't out anyone."

"Cool, I can say things like 'Kryptonian neurostructure' instead of 'the neurostructure of whatever strange alien race produced this miraculous technology,' that would get old fast."

"Do we actually have significantly different neurostructure?"

"Oh, sure. For one thing the solar energy accumulator organelles are woven in there, we get a surprising amount of feedback - that's why I sunbathe so much. For another thing, we've got more space - but humans have more flexibility, more redundancy, more adaptability. Some of the things you can do to a human brain and leave it still basically functional are horrifying. You ever hear about Phineas Gage?"

"The name sounds familiar..."

"19th century railway foreman, dynamited a rock and accidentally sent a railroad spike straight through his own head. Lost almost his entire frontal lobe. Lived for twelve more years, having suffered some personality changes but otherwise remained fully functional."