They are starting to roll out a version for mobile phones now, but it requires that your operator supports it and many will need a new sim card so it takes time.
In the meantime if you are out with your friend and you finds out you want to see a movie, you will have to walk to the theater or call a friend with a pc to buy a ticket. You can't just do it online from you iPhone (some movie theaters may have a app for that, but not where I currently live :( ).
It feels especially bad because it wasn't always like this. Before the massive adoption of Bank ID you could do almost anything online from your phone.
Norway: https://www.bankid.no/
Sweden: http://www.bankid.com/
The Swedish one uses native apps for Windows, Mac and Linux rather than java. Still trivial to attack from a trojan though.. :/