"Internet of Things". With several products and Home and Kitchen Appliances that connect the internet directly, I do not see any nonsense in starting to create OSs that already have some wallet to be used in a fast, practical and safe way.
There's no way in hell I'm going to send Bitcoins to a wallet on my fridge or toaster! The security on those things is terrible (example:
How a fish tank helped hack a casino).
Tails allows you to configure a persistence volume, to store the data that you want to keep.
All Linux distributions allow you to do this.
What makes Tails special is this:
It aims at preserving your privacy and anonymity, and helps you to:
use the Internet anonymously and circumvent censorship;
all connections to the Internet are forced to go through the Tor network;
leave no trace on the computer you are using unless you ask it explicitly;
use state-of-the-art cryptographic tools to encrypt your files, emails and instant messaging.
If I'm fully paranoid, I wouldn't want to run it from a USB stick, with the risk of any data being stored on there. A single-write DVD would be safer, but less convenient.
I like Tails, because you can basically boot from a clean OS, every time.
I use either Knoppix or Ubuntu when I need that, but I admit that choice is mainly based on the fact that I'm familiar with them already.
I am just saying, give them a out-of-the-box option with a basic wallet that are trusted and tested by a legitimate company and things will be more secure for the newbies.
I don't think this will protect clueless Newbies from dumb mistakes, or from attackers.
Even better: add a free open source wallet. But I wouldn't like being force to use the OS' choice of wallet, and it will quickly be outdated. Imagine using a LIVE CD with a critical vulnerability in Electrum!