I was pissed when going to the T530 and losing lines of resolution and while the T530 was otherwise a good fast 4 core computer, the loss of resolutiion was a daily thorn that caused me to swear at Lenovo for being so cheap.
I was eagerly waiting for the T540p since it was the first lenovo with more pixels. and the fact that it came with Haswell was promissing for battery life. In the end, the battery life is almost the same as the T530's because the more efficient CPU is offset by the beautiful screen.
Here's a quick rundown:
What's annoying with the T540p is the lack of mouse buttons. I had to use bluetack on the mousepad to clearly show where the locations for button #1, #2, and #3. For the rest, I was able to put a 1TB SSD, and a 1TB hard drive, so it's a pretty decked out machine :)
I wrote a full report on the T540p with linux.