I've been using an x230 since it came out and still love it as much as the day I bought it. The only problem I've ever had with it is the screen started to develop "bright spots" in some areas, but Lenovo promptly sent an IBM technician to my house to replace the screen. Is the x series lineup at Lenovo ultrabook only now?
nothing really happened from x220 and x240
I've opened up this thing several times.. They could definitely put more stuff in here LOL.. so much empty space..
not really, the HDD takes up a lot of space so they can keep it so thin. The wifi card area has a slot for an SSD, so that space is taken as well. Basically the only remaining space is for the battery under the screen or the upper left area for the fan/heatsink, and there's nothing you'd really want to put there.
The X2*0 series can run for absolute ages with that massive battery you caa get for it.
As far as the size, I like it. HP is going in that direction as well, and apple is already there with the MBPr13". I think a small-ish business-class computer is the way to go for sure.
Dell makes some decent comptuers, but I don't think you'll want any of them moving from the X220. That's why I recommend another company like HP instead.