I voted it depends. I want a homebirth for my next baby. I had a hospital birth for dd b/c my intuition was screaming at me. She was born with special needs and spent 5 days in the NICU. I really didn't have any interventions I regret or anything. It was fine for what it was and she needed not to be at home.
I would do a homebirth in the hospital if I were living with relatives, like I am now, who I can't trust not to stress me out during labor. Granted, you can always go to a hotel, but then I'd feel like I was afraid of being too loud, or wanting to walk around and not being able to, or something. Plus I think hotels are disgustingly dirty & I'd feel like I had to bring all my own sheets etc (yes, hospitals are dirty, but at least people aren't normally having sex on the same dirty sheets over and over again!). In that situation, I can imagine waiting as long as possible at home until my relatives starting getting on my nerves, and then I picture the "ideal" homebirth hospital being set up like a motel where you can just check in, or have your partner check you in, and go into your own entrance with a big, spotlessly clean, comfy room with all sorts of birth stools, swings, jacuzzi, positioners, chairs, bed etc. Dimmers on the lights and music or dvds available if that's what you want/need.
Several buttons would be available to press: a doula, a CNM, or an OB in case of emergency- and yes, an anesthesiologist if that's what you want, too. Room service also avail. You could leave whenever you wanted, 3 hours or 3 days. I can see the use of a place like that. Basically, a birth center, but with much less intervention and more of a UC setup. No IV, no cervical checks, no being on a clock, just a big birth motel where you drive up to your room and have whatever birth you want.