I've been seeing a lot of rooms with white slip covers lately. I don't think it's something I would choose to do.
It's obviously a way to cover up your old sofas and definitely less expensive than buying new furniture. Maybe some people are covering their printed or colorful sofas to get that neutral minimalist look that's been out there for awhile?
Here are a few photos I found. What do you think? Do you use white slipcovers?
The beautiful view definitely adds some color to the space. Not loving the pillows and coffee table though.

I kind of like the neutral vibe with the darker pillows, but it still needs a bit more color pop for me. I don't understand the table pushed up against the furniture at all.

I like the wall color, pillows, & colorful accessories with the white slipcovers. Looks like a light, fun, & cheery space. I'd probably select fewer but larger artwork to replace all the smaller ones.

The shades of aqua and blue, along with the shells, give this room a beachy vibe. If I had a place near the beach it would be nice to decorate like this. Plus, the slipcovers would protect my furniture from sand and sunscreen.

The floor & windows are beautiful! I also like the ceiling, pillows, fireplace, and shelves. I like greenery, but I don't care for the choice of the cuttings in the vases, or their placement on the mantel. I'd prefer a few plants in pots. I also don't like the coffee table, dark pink throw, yellow print on the chair, or the curtains.

I like this one a lot. I love the architecture of the room. The fireplace, built-ins, and floor are very nice. I like the blue printed pillows and most of the accessories.
