I think go for wood and keep it traditional. I think they use cedar for steam rooms normally. They may cost more initially but will function better for the purpose... with polycarbonate sheeting you will have the constant run off growing mould and mildew and the cleaning and maintenance will be difficult. Timber will expand and contract with the changes in humidity and temperature and then breathe and dry out well afterwards. It will also look way better. Just make sure the timber is not treated.

I chose stone although wood for example fits into the same catagory, as does copper then concrete and tiles to a lesser degree being manufactured but their uses are limitless!! On the floor, a bench, a wall, artwork or a feature!! There is pretty much nothing you can't do with all of these items, so I can't seen how all of them won't just keep on keeping on in different forms perhaps but none the less, still keeping on. Some bright spark will come up with a "new look" and it will go wild I'm sure in 2016 but what it might be is anyones guess but if I have to pick, I'll go copper!!

What about a sliding panel with the picture mounted on it that hides the tv?

We have just finished renovating two bathrooms and I was adamant I didn’t want shiny chrome. I insisted on Astra Walker’s brushed platinum tapware and fittings. Whilst it does look a bit gorgeous, I’m afraid it’s not worth the extra 25-30% we paid for it (shhhh, thank god my husband isn’t on Houzz!!). With all special finishes I find you need to be quite particular about wiping down the fittings otherwise they look grubby with water stains. Hindsight you marvelous thing, you’re always 20/20 aren’t you??!! I’ll be sticking to good quality chrome if we ever renovate again. Especially since you can get such a wide variety of styles that suit anything from a Victorian style bathroom to pure minimalism. Good luck.