Traveling on Business with an iPad or an iPhone only is wonderful - so light and without the need to carry a heavy laptop which you might only need to give your great presentation.
What are the issues you are facing?
- Powerpoint is not compatible with your iPhone or iPad
- Presenting a PDF-version of your presentation via the iPhone is not easy either
- Some cloud-services allow to present from the iPhone, but they require registration, sometimes a fee and storing your confidential presentation in yet another cloud-storage
- Dropbox itself does not support AirPlay for photos