Developers laptops must provide power, flexibility and latest technology to play with
When using cloud ressources with whatever virtual machines or dedicated hosts for testing web development or server side features it doesn't really mater because all is needed is a link a enough juice to run an editor/IDE locally.
But there are always time where it's more pratical to run some bit (or the entire project) in a local Virtual Machine.
As others have mentionned - Minimum is 8GB.
For the same reasons as above, virtualization features are important and the CPU such as Intel i7 must be present in the laptop line.
Eternal question of Mobility vs Graphicability depending on work style.
Bottom line is when XPS 13 laptop is released, the 14 and 15" cousins must be made available at same time with at least same specs.
Latest, fastest SSD must be present
Each project/work needs are different.
Keep things open and let us have the choice.
Dell has been pretty good with the online model offering choice - Please keep it this way and avoid pre-configured models.
No need to be locked down.
Dell must require/liase accordingly with hardware part manafucturers to provide support underneath. It includes Open Source/non Proprietary drivers.
No more out of the blue unknown/non documented hardware (i.e Latitute/Inspiron track pad issues for almost 2 years because Dell says it's the manufacturer fault's).
That doesn't means support for every new hardware but a road to get there. Can dell offer that flexibility?
By essence developers test, validate cutting edge technologies.
Means hardware must be released often with latest stuff.
And keep us informed. Not 6+ months later.
BTW where is Thunderbolt roadmap?