Coulda.. yep to be honest as a PC techie, the 'connection' issues have my paranoia alarm bells ringing! That said, she report all the sites (always different venues) have projectors with std VGA connectors, and has never experienced any issues with her laptop. I think (hope?) 'nowadays' that the connection issue is a thing of the past. She travels all over the country, and doesn't always take her car (eg: train to London), so though she would take the laptop along for the first couple of times (for confidence), the point is she want to dump it to make travelling easier over all, as she has other stuff to demonstrate and obviously carry to the sites. This is about making travelling easier, not just wanting to play with toys' (dear god no, she hates IT!). TBH I agree it not the best option for you 'job' but she seen the 'light', so I need some/any reasonable arguments to bring her back down to earth.
Dropbox/transfer would be done before travelling.. we wouldn't rely on wifi and I'd still expect her to carry it on a USB stick, for a worst case senario (and hope to borrow a laptop)
Leffeboy - her powerpoint presentation are more slide shows than interactive presentations, and we tested her current one on the Galaxy Tab, it worked fine, so she'd test the presentation on the tablet before leaving... Maybe I overstated the "replace the laptop", she would still use the laptop at home to create the presentation but want to use the tablet on the 'road' to present them and use it generally when Wifi allows and for entertainment [films] in the hotel overnight.
Loddrick - Her work have given Ipad's to full-timers but as she an overpaid (part time) contractor, her hints have obviously been too subtle.
I think the main stumbling black will be the battery life/power charge options.. she'd want to use it on train journeys to and from (they have wifi apparently), and the presentation is displayed all day. So it whether the charger connection, is also the only 'output'.