Minimum: Save your ppt as PDF and display on tablet. Any tablet, even if it does not support MS word $stuff.
Minimum: If iPad, do your presentation in KeyNote. They are all equivalent tools.
Minimum + net acess: You can upload your presentations to the cloud such as a service like slideshare. There are many similar sights.
More than minimum: If you want wow non linear presentations that mirror how humans present, learn prezi - not difficult. You are not constrained to decks and bullets like in traditional presentation software. Ideally - the decks are to support what YOU are saying not for you to read out, line by line, bullet by bullet, to your audience.
See this TED presentation by Hans Rosling:
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