TransLink, South-East Queensland's public transport network, is set to phase out paper tickets within a few years. What this means if you just need to take one trip once is that you can't just go to the train station or hop on a bus. You need to go first to a 7-11 or news agent, buy a go card (including security deposit), make your trip, then go to a train station and turn in your card for a refund of the remaining credit. This is to "simplify" the public transport process. I'll admit go cards are very useful for frequent travellers like daily commuters, but for infrequent travellers and tourists, this is going to create unnecessary hoops to jump through and will discourage people from taking public transport for irregular, casual trips.
Mokalus of Borg
PS - It's possible they only mean multi-trip paper tickets.
PPS - But then why did they say "all paper tickets"?