I'm still on a T420s. Other than the rather crap panel it is a great machine still. I have been holding out for a decent fanless machine. Something with the same sort of power as a 3rd or 4th gen i5/7, M.2 SSD, 1080p or better 14" IPS, etc.

They are getting very close. I work in very quiet environments and I hate fan noise. Also no moving parts!