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Hi William, I think it  mainly depends on whether there is enough search demand to create specialized "living room furniture" pages.  If there is, then go ahead and create those pages and aim for them to rank on their own.  If not, placing the canonical to point to the main page is enough. I wouldn't place a "noindex" there. There's a great article that was posted about Shopify SEO on the MOZ Blog last week and can be found here.  It could be worth checking out if you haven't read it yet.

they are different

I mostly agree with Robin here. Also, be sure NOT to mix 'noindex' and canonical tags. Google will (in most cases) end up picking rel=canonical over noindex when you use both of these. So it is very possible that even when using 'noindex', your pages will appear in search results. The approach of canonicalising all your paginated pages to the first one, is not good practice. We all just found out that Google hasn't been using rel=next/prev for a couple of years now, but most of the pagination was indexed in a correct way. So doing nothing is maybe not that bad of an option. If you see things going wrong, you can further evaluate and test other possibilities.