The issue is that the benchmark software used on the Windows with ARM ran over an emulation.
It´s very possible that with a benchmark software running natively the score will get much higher.
Also it´s like if you run an emulated android version of the geekbench on Windows x86 the score you would get would be much slower.
For the only thing i think this works is to imagine how good the emulation performance will be on these machines, and i think is plenty good.
Imagine, native Windows Universal Applications will get maybe twice as better performance (maybe something compared to a i3 or a ULV i5)
While emulated applications will get a performance comparable to a Intel Pentium or Intel Celeron. Of course you can´t use this to emulate Crysis or GTAV, but for many legacy apps, maybe work apps will work well.
For most people is going to be much more than required
Right now I´m using a i3 2367m, running 1.4GHz dual core, scoring less than 3k on Geekbench; but performance-wise is more than sufficient to run everything i need for work and entertaiment; i´m not a power user nor a super light user. I´ve even used Premiere Pro in this machine! Doesn´t fly! but it works.
It´s going to be very interesting to see when Microsoft manages to squeeze the most of the Snapdragon CPUs and with future generations of the chips, better optimized to run Windows.
Also will be interesting when they began to release PC games for Snapdragon, as they have better GPUs than Intel.