Well the Zenbook Panel is equally good in contrast, color and much better in brightness. Also it is matte.
Matte and much brighter makes it truly on the go worthy.
http://www.notebookcheck.com/Test-Apple-MacBook-Pro-13-Retina-2-5-GHz-Late-2012.84077.0.html
http://www.notebookcheck.com/Test-Asus-Zenbook-Prime-UX31A-Ultrabook.77076.0.html
Full HD at 13" is already so sharp that at any reasonable distance it is retina.
Sorry but the negatives of boot camp you mentioned aren't due to apple but due to windows. The trackpad isn't unusable, yes it lacks compared to osx but I have never used a trackpad that was as smooth as the apple ones.
It is of no consequence who is to blame but the end result is that a touchpad with proper multi touch drivers is better than one with out. In this case it also is Apple's fault that they don't offer drivers with multitouch features similar to what you get in Windows from Synaptics & Co.
The thing is the trackpad could do more. The Windows notebooks trackpads do.
Battery life is worse due to the operating system, not apple.
Again it wouldn't make a difference whose fault it is. Still though it is the fault of whoever makes the drivers in the bootcamp case it is Apple. Sony and Samsung can squeeze out just as much battery life from their similar specced Windows notebooks.
Just compare a Samsung Series 9 to the MacBook Air.
http://www.notebookcheck.com/Test-Update-Samsung-Serie-9-900X3C-A04DE-Subnotebook.82316.0.html
http://www.notebookcheck.com/Test-Apple-MacBook-Air-13-Mid-2012-Subnotebook.77213.0.html
The score the same with a slight edge for the Samsung while the Air even has a 13% (6Wh) bigger battery.
The reason Windows often show so bad battery life is because manufactures provide often mediocre drivers and parts. People simply compare cheap thrown together stuff with high quality notebooks.
How much an OS draws on average that is its fault but if the idle and load power consumption values are different that is a driver issue.
The Air goes from 5.3-10.1 in OSX to 7.3-13.9 (Windows 7) with idle load and most display brightness up down.
The Samsung shows 5.2 to 10.6 under Windows.
There is clearly some hardware component the Air simply doesn't shut down in Windows which sucks the added 2-3 Watts.