A lot of people know there are still Private PSO servers, but most people who have interest in Dreamcast just assume the game is not playable due to only having broadband internet at home. I think the Raspberry Pi setup will help more users join in online gaming.
Honestly what I would like to see is someone streamed lined these and started selling them, a kickstarter or something. Putting this all together into a nice project box and selling it as an actual Dreamcast accessory. This would also help in advertising the games that are still playable online, users who had no idea the DC could be played online would start showing up. Although it would be helpful if we get a few more games online too. AFO is supposed to be coming soon, which is great as that game never saw life on another console.
But being DC dev, we just got the Raspberry Pi thing working, so you know, baby steps.