@Franko,
Most people I know have printers that connect via wi-fi or ethernet. It's very easy to print to a printer from an iPhone/iPad, I do it several times a week, always without a problem.
DTP would be a stretch but writing reports, spreadsheets, letters, simple newsletters, etc work fine on an iPad with bluetooth keyboard. There's some fantastic apps, Distant Suns out looking at the sky for example. Games are becoming more complex. In five years tablets will be the predominant form of computer.
