Presentations that run in conference booths have a few special requirements

• Smaller screens, probably a 16:9 aspect ratio. One set of people will stand close to watch it, the other will see the screens far in the distance. The screens become part of the overall branding of the booth. For the latter group, it is important the the graphical look & feel of your company pops out. Not through the use of big logos, but by applying the corporate colours boldly.
• Viewers are unlikely to watch through the whole thing, but rather look at a slide here and there out of context. There is no one nearby to explain, each slide needs to stand on its own. This calls fro big bold visuals, with a clear headline that spells out the message of the slide.
• Go for a relatively slow page rotation. If you are focused in the office, the presentation might run very slow, you have read the slide 10 times over before it goes on to the next one. In a conference booth, especially with more screens, things can start to look ver nervous when each screen is moving quickly. 
• Related to this. If you keep the differences between the layout of the slides similar, the page transitions will look less dramatic, creating a calmer overall feel of the presentation

Art: Pieter Aertsen, Market Stall, 1569