I have a few ideas, which one is more interesting for you?

I'm working on the first one right now, but I'm not sure if it's a good idea to continue!

1. Casual video-conference. Codename: Wupi (https://wupi.io/). You install a tablet in the kitchen or living room, in the wall. Your contacts appear in green when available (it detects movement with the camera). Knowing when they are available without them having to do anything enables a more casual social interaction. Improvements: use Bluetooth/face recognition to detect who is in the room. Problems: Google Nest (https://store.google.com/uk/product/google_nest_hub_max) is my main competitor, and I don't have a defined revenue model. An advantage I have against google is that as I'm not google I can support any device and OS, so I've been thinking on creating a version for iOS as well. Another problem is that videoconferencing servers cost money but users probably expect it to be free like Google hangouts. A possibility is to get money initially from selling the tablet, and later on with ads or data as having "real state" directly in people's kitchens is quite valuable.

2. light-field video-camera. Light-fields enable a more immersive VR experience: it gives you parallax, the ability to peek behind objects. This can be achieved by using a big array of camera sensors instead of a single camera, and then using a fairly straightforward algorithm to render the image from different points of view. You can see an example of light-field video here(https://youtu.be/lpu4GJZLXEw?t=1404) (also from google!) . The idea would be to try first with a 4x4 array, then increase it. Main problem is that this is a product based on a mix of hardware and software, and hardware is a difficult business. I did make a demo a couple years ago with light-fields, so I'm confident I can manage the software part. I can also do the hardware as I know more than enough of electronics, but if you sum all the parts, it's quite a big endeavor. There are plenty of possible uses for such a product (hardware+software), so in principle one could try to get the revenue from a service that uses the hardware instead of selling the camera. Or I could contact service companies that could use this hardware and get funding from them. Perhaps a crowdfunding campaign?