We SO need truly portable "on the go" power sources.
Think smaller, slimmer wall chargers and smaller power banks. I love my powerpoint II wall charger for my iPad Pro 11" and iPhone XS Max (2 of them actually) but it's useless for travel because it's so heavy and bulky that it falls out of wall outlets at the airport, coffee shop, and just about everywhere else that has overused outlets. Atom is cute and MAY work but slimmer, 2-port would be better. On this it's a matter of physics but you asked us to dream it up!
Also, smaller usb c PD power banks are SO desperately needed. I don't need to charge my iPhone XS Max 7.8 times from a monster brick. I do, however, need a back up so that I don't worry about my phone (which I use for drafting response emails with a massive "send" when we land) dying while I'm on the plane... all because I couldn't use my wall charger at the airport because it fell out of the outlet!
If either of these came to market, they'd be gobbled up like candy!