Hypno, that is probably largely a change in flavor. I'm talking about resolution, and quantization noise.
To make the math cleaner I'll use 60db instead of 75. suppose full scale on ADC happens at 140 and quiet studio recording at 80db. With 60db below max the voltage is 1/1000th of max. 10bits is a factor of 1024, which is close enough to 1000. This means we are only using about 14 bits out of 24 and the rest is zeros. I recorded good sounding tapes at 16 bit, and I do record at -12 at times because I'd rather let it ride than clean up my gain adjustments in post, so I can't say that 14bit resolution is crap, but I think the whole thing is worthy of consideration.
The trade off is that this quantization noise is pretty much the only noise anywhere in the system, no chance of noise from ground loops, preamps, cell phones, or any of that stuff. Probably the overall system is improved, but I'd really want to understand the tradeoffs before I dropped big bucks on a digital mic rig.