It will be nice if the new MSR hollow tube filter media is as good as it sounds. If it is "backpacker proof" and works as advertised I'm sure it will replace a lot of lesser filters. By "lesser" I mean of lesser longevity in the field.
I'm still using my SteriPen Adventurer year around with Katadyn chlorine dioxide tabs as backup. I'll use #2 coffee filters W/small funnel 1st if the water looks less than clear.
But, filter or UV treatment preferences aside, I still think it's good to pop a few chloring dioxide tabs in one's hydration bladder every three to four days and at cleanup time just to preclude any nasties in the bladder, hose and, especially, mouthpiece.
"There are no comfortable backpacks. Some are just less uncomfortable than others."