Re: What purpose does a tablet serve?
"Small DELL" is either the Latitude 10 or the newer Venue. The Lat10 had a 1280x800 screen so there is a chance the ERP screen does not work on that. 2GB/CTrail Atom add more problems.
The S/Ps have at least an i3 (i5 in the available versions), 4GB and 1920x1080. If the ERP does not run on that - it is NOT designed for a notebook but for a dual screen WS / a notebook + dock. S/P2 can do that as well.
And if that is not enough - tablet pc with 16GB, i7 and 13'' have existed / do exist for some years now. Fujitsu T902 will do the job.
As for the "touch" strawman - roll up tight and inject where the sun does not shine. x86 tablet pc like the S/P have a extremly precise stylus and accept mouse/keyboard for tasks that require them