After getting tired of ads on my PAID smart TV, 6 months ago I started building a casting device using raspberry pi for myself. A couple of months later one of my friends who is an AV technician ended up using it at the largest convention venue in Barcelona to play content on loop, here's a video of that: https://www.youtube.com/shorts/FF3I9EOs4AA. Fast forward to last month, now I have started selling these in Barcelona, Spain where I am based out of and branched it into three use cases: digital signage, casting, and a portable computer for presentations at events. Here is the link with features: https://soljacast.com