You could ask a friend to help you present a recorded or live presentation through his/her mobile phone/laptop.
You may wish to record a short video of your presentation/demonstration (slides + audio) and upload it to YouTube; include a short URL and a large QR code on the last slide.
You will need:
- Permission from the organizers and/or session chairs (be optimistic!)
- A colleague/friend who wants to help and can help (e.g., free during your session)
- Reliable internet connection (Wi-Fi) in the conference room
If the connection fails, your friend could at least present your recorded video presentation.
For engagement by the audience, it is the quality of your work that matters most: your excellent remote/recorded presetation is likely to be more engaging and better received than an average one presented in-person.
I tried a slightly modified version of this myself with the help of a colleague, and it was - unexpectedly - successful and well-received, and several people watched the online video shortly later.
P.S: When a computer science conference in 2017/2018 works as in 1980, I believe a cultural change is needed. Teleconferencing is smarter and greener solution than requiring physical presence for everyone, and allows wider participation.