sub+satellite or full range?


what are the advantages/disadvantages of full range speaker opposite to subwoofer + a good quality speaker? for example, a wilson WP against a pair of cubs + subwoofer.

Im asking because subwoofers are in almost all houses now and this maybe let us rise the WAF with smaller and less obtructive spakers without loosing quality?.
Thnaks in advance
jorsan
A Sat+sub is a great WAF friendly option. If you wall mount the small satellite speakers the wife may be even happier. They can sound very good but integration can be a challenge/headache so I'd recommend you go with one manufacturer for sub and satellites.
Thanks to all; more or less your responses pointing the same way: we can build an equivalent quality with sub/sat if takes care of integration between sub and sat mainly.
Thanks
Monitor Audio R90 sats with the R360 sub are quite good, affordable, beautiful in Rosenut (both sat & sub) and have a very high WAF. Nothing to sneeze at.
"Subwoofers are in almost all houses now." I bet to differ. I would be that if you polled American households less than 15% have subwoofers.