My earlier snarky comments aside, IMHO a larger issue that will affect savings accounts - this coming from a civil engineering professional who has had a hand in designing and/or constructing many, many bridge replacements and retrofits and worked on several light rail construction projects - I'd rather see infrastructure improvement money directed at addressing getting people *out* of cars before designing nifty-new stuff for that industry. I shudder, literally, at how much of our transportation system is shot/done/crumbling/failing - if most of you here reading this knew what I know and have seen a quick drive to the mall or store might give you a bit of pause; the 10-year period of Congress not approving transportation funding hasn't helped this mess.
I'm out of that industry so I feel I'm a bit more objective than my former counterparts. All of this talk and press about new tech really bugs me - I have a really nice, fast Benz but I'd have a hard time driving it on crumbling roads. Near where I'm at now, a few years ago, there was a breach in a retaining wall holding back material supporting a bridge abutment for a bridge within the Corps of Engineer's Right-of-Way and the bridge failed. It was never replaced - no money for a replacement, and that was 3 years ago. The detour is a bit of a PITA...
Consider the Portland-Vancouver commute - there's two bridges, one built in the 1910s (a Parker-type through-truss structure) and the other was built/completed in 1985 (I was there, the Glenn L. Jackson Memorial Bridge - he was a really nice person!). The former carries about 135k VPD (vehicles per day) and the latter about 145k VPD - traffic sucks pretty much every day with all of the commuters from Vancouver heading to Portland. The replacement for the I-5 Bridge has been forecast at around $4-5.5B, and that's never going to get funded...
The tech "breakthrough" ought to be utilizing some of the empty structures in Vancouver and constructing a fiberoptic tie and funding some relocations of businesses from Portland to Vancouver for Clark County residents. The cost will be significantly less than paying for a new bridge and completed a lot faster - and it'll get a lot of commuters off the road as well. But, getting commuters off the Interstate doesn't sell Teslas or Mercedes' or Buicks - keeping in mind the hundreds of miles of trolley track paved over in Portland around 100 years ago, courtesy of Mr. Ford's new autos...
I'd rather see an investment by Apple of a nationwide fiber network - sign me up... </rant>