As someone who has actually been charged with merely transporting a scanner in a vehicle, I know alot about this topic. Actually (and thankfully), it is no longer illegal to have a scanner in your vehicle in Michigan.
It is, however, illegal to have a scanner during the commission of any crime greater than a 93-day misdemeanor. So if you commit a felony while having a scanner in your possession, you will be also charged with another felony for having the scanner. A misdemeanor crime, same thing only you get another misdemeanor. It is now totally irrelevant whether it is in your vehicle or home.
As far as I know nobody has tested the legality of whether or not listening to an internet streaming feed, on a computer or on an iPhone, as the law states "radio" (although an iPhone is technically a radio so I guess that would count). What's also important to realize is, unlike the old law where if you were a licensed Amateur Radio operator, you could legally transport a scanner/ham radio in a vehicle, there is no such protection for ham operators anymore. As a scanner feed provider and amateur radio operator, if the police came breaking down my door, being I have an actual scanner in my residence, I could be charged if I were committing a crime of some sort if they could prove it was used in the commission of a crime.
The current law is here if you're interested:
Michigan Legislature - Section 750.508