Details about hardware requirements for ubuntu touch

I am considering getting a new Android tablet and installing Ubuntu Touch on it.
On the Ubuntu "Operators and OEMs" page, there is a table of the hardware requirements to run Ubuntu Touch on a tablet. Here is the table:

                   Entry level consumer     High-end Ubuntu
                   Ubuntu tablet            enterprise tablet
Processor arch.    Dual-core Cortex A15     Quad-core A15 or Intel x86
Memory             2GB preferred            4GB preferred
Flash storage      8GB minimum              8GB minimum
Screen size        7-10 inch                10-12 inch
Multi-touch        4 fingers                4-10 fingers
Full desktop       No                       Yes
convergence

So, my question is:
What is the difference between the "Entry level consumer Ubuntu tablet" and the "High-end Ubuntu enterprise tablet" and do I care? And what is this "Full desktop convergence" feature?

Ubuntu Touch is a variant of Ubuntu for smartphones and tablets. Higher-end Ubuntu smartphones will be able to run a full Ubuntu desktop when connected to a monitor and keyboard, a feature pioneered in Ubuntu for Android.

Ubuntu for Android is a variant of Ubuntu designed to run on Android phones, which provides a windowing application environment and desktop environment of Ubuntu when the phone is docked to lapdock. It is expected to come preloaded on several phones.

^{Source: Wikipedia}