Assuming a redesign
- 23" 4382x2465 display (As Apple loves odd resolutions to maintain PPI. Even though straight 16:9 4K makes more sense from a cost perspective. Custom resolutions are pricey to manufacture.)
- 8GB RAM
- 1TB 5400RPM Fusion drive
- Integrated graphics
- 720p camera
- No Ethernet, USB Type A, or SD card reader (Thunderbolt only)
- Core i3 quad core (Possibly Apple's A14 as entry level makes the most sense to introduce ARM for Mac)
- 802.11ax/Bluetooth 5.0
Note that this isn't a wishlist. Just what I think is likely with a redesign.