I think the lower counters may be used as a desk surface.

I have a large table in the middle of my laundry room that I added castors too. It allows me to move the table around but also brought the table up to counter height. I got the idea from Martha Stewart's kitchen (image below) (her islands are on castors and I thought it was a great idea).

I use the table for folding, wrapping gifts, crafts. It's been great.

I would not want to bend over to fold.

My counter height is 36" I think.

I think it has to be the height you find comfortable. Try folding laundry on a table you have and then on a regular counter top. See what works best for you. Table height works for me but I am short. Counter height forces me to bend my elbows to fold laundry. Not very ergonomic for me at all.