If they do all close altogether, then it's the end of an era and it does seem a little sad in some ways, (as most of us here remember the glory days of WH Smiths when they sold records, DVDs, magazines, books, stationary, comics, annuals, art materials and paints, puzzle books, and all sorts of stuff.)
It was a lovely place to look around and explore pre 21st century, but as has been said, they lost it years ago, with their high prices for things, and never really modernising.
Also, as someone mentioned, most of the shops look incredibly dingy and threadbare, and dark and dull, and they often have fusty carpets.. I think I have bought 5 things from a WH Smith/T Jones store this century. It isn't helped of course that places like Home Bargains and B & M and Poundstretcher, offer most of what WH Smiths/TG Jones does, (and more!) much cheaper, and have much more of a selection.
But they had their chance, they had plenty of opportunities to improve and they didn't. Only the train station and airport branches kept them going. They should have been shut down 2 decades ago.
I find it hard to feel sad or blue about it, because I was 'over' WH Smiths 25 years ago really.