As far as I understand, the Interface will scale perfectly, while the other graphics use a new algorithm to scale up the graphics. I guess we'll have to judge the results.
"1) Improved user interface. The old Baldur's Gate interface was created around 640x480 resolution. We are going in and re-writing the UI system to work for multiple larger resolutions and we are using the iPad 3 (at 2048x1536) as one of our target resolutions."
and:
"BG:EE natively supports high resolutions in 4:3, 16:9 and 16:10 format up to 2880x1800. All original art assets, including sprites and background art, will be upscaled in real time to adapt to the chosen screen resolution without incurring visual artifacts (e.g. shrinking, stretching, etc.). Cutmull-Rom Bicubic filtering will be used to ensure that all supported resolutions display sharp graphics."
Comments
"1) Improved user interface. The old Baldur's Gate interface was created around 640x480 resolution. We are going in and re-writing the UI system to work for multiple larger resolutions and we are using the iPad 3 (at 2048x1536) as one of our target resolutions."
and:
"BG:EE natively supports high resolutions in 4:3, 16:9 and 16:10 format up to 2880x1800. All original art assets, including sprites and background art, will be upscaled in real time to adapt to the chosen screen resolution without incurring visual artifacts (e.g. shrinking, stretching, etc.). Cutmull-Rom Bicubic filtering will be used to ensure that all supported resolutions display sharp graphics."
So yes, @space_hamster is correct.