Interactive technology fascinates me. When Slate starts the flitter in St. Louis Tower, I have it talk to him, recognizing other occupants in the car, and interacting with other AI entities in other flitters and Towers. The canopy in the flitter is also light sensitive, darkening in a fraction of a second when it hits the sunlight. Here it is in the passage from The Wheel:

The floor shivered. He climbed in and palmed the screen. It glowed green, and when he released it, the green turned into a nebula, then coalesced into the StiRik logo, a feathered loop around a stylized letter R. He’d been told it looked a bit like a DNA strand caught in a tornado. The systems began to come online, air and lights, with the gentle beat of a muted rezband in the background. The seats self-adjusted, and the windows cleared, transparent in the muted lights of the garage.

“Welcome, Slate. I see you are initiating travel today.” A carefully modulated voice spoke. “This is not an official day of work. Where shall I plan your destination?”

“The Falls. Right?” Sundra.

“Is the Falls an acceptable destination, Slate? I can integrate Sundra’s prompts into my permissions file for the day. Travel time is one hour forty-three minutes, with a seven-minute delay. The egress ramps are already backed up. This seems to be a popular excursion day.”

“Integrate and negotiate. I want out quicker.” Slate looked at Sundra, only to have her bite her lip and turn away. It was the redness in her eyes that told how she felt.

“Negotiations may require credit disbursement. How much—”

“Just do it, any level.”

“Negotiations commenced. Egress slot confirmed. Cost—”

“Unimportant. How long?” He glanced back at the kids, the internal ESyst already up and attempting to entertain them. Caitlan was tossing a virtual ball back and forth in her hands. Levi was holding a lemur, all nanodust and lumens made real, and it was licking his face. He laughed and looked like the rush to board was forgotten.

“Thirteen seconds. Initiating electrics now with turbines coming online.” The flitter began to move, and quite rapidly, although the buildup of speed was so smooth it was hardly noticed. They were still, and then they were jettisoned toward the egress ramp, internal inertia dampers doing just that, and slotting in with computer efficiency, shooting from the building exactly thirteen seconds later.

Sunlight slashed through the flitter, and immediately, the canopy silvered, cutting the glare. The whine of the turbines bled through, with just a hint of oil and hot metal, then the sound rose out of the audible range, and things were silent.