And please, never change the classic black and red design.
Issues:
- at least on pre 2010 thinkpads, the sensor may recalibrate weirdly once a week and the pointer will fight you for 2 seconds (annoying but rare enough so you don't smash the laptop)
- Aiming is not very precise, but I'm a keyboard head, so the less movement my wrists do, the better... trackpads are hell for me, and I rarely need precise (by that I mean, photoshop or real time analog control precise) positioning.
Also I find it way easier to drag and drop with a trackpoint, on a trackpad the frontier between single click, long press and drag, release is so thin.. I lost track(sic) of the amount of times I triggered false positives of every cases (who never dragged something while hovering or resting his thumb too close to the pad surface ?)
That attitude, the holistic view of the experience, is what people are willing to pay more for with Apple, that not everyone values.
That means I'm stuck on the T420s for the foreseeable future.
[0] http://www.thinkwiki.org/wiki/Install_Classic_Keyboard_on_xx...