- More dynamic range
- Spot metering
- Anti-dust system for the sensor
- 12.6 Mpixels or more (a higher number is great for creative cropping)
- Better high-ISO performance (I know, it's good already)
- Brighter and bigger viewfinder (that enables MF)
- 100% view in the viewfinder
- ISO adjustable in 1/3 stops
- USB 2.0 compatible
- Larger and brighter high resolution LCD
- Metering independent from selected AF-points
- Better and faster AF (with more high precision cross sensors and improved algorithms)
- ISO permanently displayed in the viewfinder (in addition to aperture and shutter speed)
- ISO permanently displayed on the small LCD (without having to push a button)
- 5fps or faster
- Better AWB performance indoors
- RGB histograms
- Auto ISO
- Wider ISO-range (25-6400)
- A weaker AA filter
- Increased RAW buffer
- Quickly accessible Mirror lockup (by pressing two buttons)
- More quiet shutter
- Very responsive and quick operation
- Weather sealed body (at least for dust and very small bugs)
- Interchangeable focus screens
- Split-image manual focus screen (by default ?)
- Included simple wireless, radio-controlled, shutter release
- Built-in RF remote flash control with multiple channels and new 600EX flash system
- Dual Compact Flash cards (no mix with other standards)
- Built-in WiFi
- Attractive price (as always)

Some of these wishes may be reserved only for more high-end models.