If, hypothetically, for the sake of the argument, one day, a bunch of Sega executives came to your house and asked you 'ドリームキャストミニで何を見たいですか?' (What do you want to see on the Dreamcast Mini?) how would you respond? Aside from, of course, questioning why and how they found you.
Personally, I'd love to see VMU support. I'm not saying we need to buy VMUs to save our info, because then the mini would look like a huge scam, rather, I'd like to be able to transfer my VMU files to the Dreamcast Mini, in case the Mini has games I've already completed on a regular Dreamcast. Furthermore, I'd like to transfer info between game and VMU. Sonic Adventure, for example, lets you transfer Chao between the VMU and game, I'd love to be able to do that again on the DC Mini.
Basically, I want the VMU to be useful again.
As for where the VMU dock would be, I can see it being in a number of places. Behind the Mini, part of the controller, or hidden in an unlockable disc tray (similar to how the Mega Drive Mini had a small section for cartridges, but this time actually being used).
Along with VMU support, I would be pleased to see some rumblepack support. Hell, I just want to see support for all Dreamcast peripherals.
And finally, internet support. The Dreamcast was revolutionary for this, I want to see one of the most important features be preserved for the Mini.
Of course this thread doesn't have to be about just features, get creative, discuss what games you want to see, what you want to UI to look like, etc.