There's no longer any "added value" to going to a physical store
For some chains (*cough*PC World) there never was. I well remember quizzing a 'senior' sales specialist there about monitor refresh rates (CRT monitors - remember them?) and getting the sinking feeling as the look of glazed panic came over his eyes..
In the end I just asked to look at the manuals from a few boxes in order to get the detail that I wanted. This was (very much) pre-Amazon UK..