I'm not sure what the point of the article is, so OP if you could make it a little more clear what the end goal is, that would help. Are we just comparing hotel mattresses here so the traveler can choose a hotel based on the bed? Comparing how much each hotel spends on the beds? I am missing the point.

Hilton Garden Inn uses an "air chamber" bed system akin to Select Comfort/Sleep Number bed (and there is a chain that uses actual Sleep Number beds but I can't recall which). The concept/construction is heavy-grade foam "rails" that form the shape of the mattress, with a large empty space inside, into which a latex/vinyl/??? "bladder" is placed. The bladder is inflated with air, then a layer of foam laid on top, and the cloth mattress cover zipped into place. I have a select comfort bed at home and love it; I find the HGI bed to give a wonderful and refreshing sleeping experience but find it uncomfortable for lounging in bed, especially if one wants to sit up to read, watch tv, etc. I also find HGI's implementation to be a bit flawed, as the guest can adjust the firmness of the bed using a knob that can let air in or out of the bladder (more air = firmer bed) but the knob itself is located on a top corner of the mattress, meaning the guest must un-do the fitted sheet to access the knob. It's also not really intuitive so if you're in the room after someone who accidentally threw away the instructions tent, it won't be easy to figure out how to adjust the bed unless you've had one before.