Odd. I have the Thinkpad equivalent (x120e) and I agree on almost all your points except performance. 720p plays fine in linux, 1080p plays fine too but only with vaapi acceleration. Have never booted windows on it, so I can't compare there.
Gaming wise, it can handle Xonotic at native resolution (1366x768) with most of the effects cranked up at 30 fps.
Did I mention changing the hard drive does not void the warranty?