And yet $6,000+ full frame SLR's don't buy themselves. A better sensor still can't make up for any of the other aspects I mentioned, your screwed up picture just has more pixels in it.
Example of tilt-shift (left - regular lens, right - tilt shift lens angled to compensate):
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Note how the Burj Dubai looks like it is bending backwards in the left imate and the other buildings are leaning towards the vanishing point, but the right image everything appears correctly.
Fixing stuff like this in post is much more time intensive (read $$$ intensive) than taking the correct photo in the first place. Anyway, if you still don't get it after my examples, you probably never will...