That will be fantastic. I have been enjoying Delta, and DS translates surprisingly well to iOS. Having the bottom half of the screen touch sensitive means you never have to reach too far. And the screens on the DS were not too different in size from stacking them on the phone screen. It would be really great to get Mario Kart and Tetris going online.
Where but not necessarily when it’s needed. Still it’s good to connect to grid through a wall plug, without expensive or permanent equipment.