And what you will actually get as an upgrade to existing cars?
Nothing.
Chevy has not embraced the Tesla upgrade policy, and sees only additional costs and liabilities involved in upgrading previously-sold cars. Their philosophy is that if it was good enough that you bought the car, it's good...
The existing "fast" chargers along I-5 between Portland and Seattle are anything but fast.
Last time I looked, every last one was an old compliance-car charger that is barely faster than an L2 30a EVSE, and not nearly up to the DC charge rate that a Bolt can take. There may be a few faster...
A couple of days ago, after reversing out of the garage, the front camera stayed on when I drove away.
I had to re-boot the entertainment to get it to behave normally.
According to Wikipedia, with knob and tube wiring, the OP doesn't even have grounded outlets, because it would be two-wire.
At least it's copper, not the horrible aluminum wiring that was used for a while.
The Bolt's GPS could be used for location-aware ads, and the Pay-for-Gas-from-the-Display capability recently announced by Shell/Chevy should work fine.
6^)
They always ask me why there aren't any stations with more than 25kW charge rate along I-5 in Oregon and Washington, thus making EV touring impossible?
At current pricing, there is no way on earth that the Tesla Powerwall would ever pay back in power savings. Reliability? Maybe, but my house draws 40kWH/day, and it would take a lot of batteries to get thru an outage.