I don't know how many folks are familiar with the Blueretro controller box adapter that allows modern controllers to work on retro systems, but they made something more impressive that was an internal controller port board replacement for the GameCube that has built-in Bluetooth, power cycle, and sleep modes, as well as other cool features.
Well, they basically announced that they will be making one for the Dreamcast, but it is still in the research and planning stages. Imagine built-in memory card support and CMOS coin cell battery or built-in small LIPO that would always recharge itself.
You can check out the tweet below, but here is the post.
Oh that is a very good question. I would imagine it would be handled hopefully similarly to how the Brook Wingman SD adapter works. I was able to play Half Life with the right stick for aiming with the Wingman. I will be sure to ask or suggest this feature when they get closer to release. The GameCube replacement board is going for $95 US, so I think it should be a similar price point. The GameCube version is chock full of features and is going to be getting firmware updates so this one for Dreamcast should improve over time as well. That one for the Nintendo console has the ability to be updated over WiFi I believe so I would reckon the same would happen for Dreamcast.
I've been using the BlueRetro project for a while now and it's been rock solid. I prefer an external solution since I only need a single microcontroller that I can switch between for all my consoles as opposed to a replacement internal board.
Only thing I wish it had sooner was VMU support, that's on the roadmap but it's not a feature being worked on just yet.