I'd totally get something like that.. It'd be possible to have a washer in EVERY room!! lol
When the LG washer pedestal came out, I thought about getting one and dismantling it to see if a bathroom cabinet could be fitted with it. It'd be neat to be able to walk into the bathroom, pull the drawer out, strip, start a load as you get in the shower, take the load out when you're done and put the towels / rags / loofas etc in and wash those afterwards. There'd have to be some form of ventilation for it to really be worth it.
To be quite honest, I am surprised Fisher and Paykel don't already have a built-in laundry drawer.
If I could get my hands on one of those little Miele top load h-axis machines, I'd be in heaven lol.