"No use in a domestic environment"
The real question to ask is: if people spent the time and effort to make OpenSolaris (or any other OS, free or commercial) work absolutely seamlessly with all the multifarious combinations of hardware that occur in desktops and laptops, what would the expected market share of such an OS on deltops/laptops be?
The answer, once you fight your way through the propaganda and idiot geek politics is: almost none. Windows has won, with OS X running a distant second (and notably avoiding the hardware nightmare by the standard approach of being bound to specific hardware), and Linux somewhere behind that.
So, you can spend a huge amount of time (which, remember, means a huge amount of money, even if people contribute the money themselves rather than a company having to fund it) - and I mean a *huge* amount of time - and get exactly what?
Wouldn't it be more interesting to concentrate on a battle you can win? For instance, making the thing into a killer server OS. There's a lot less random crap hardware variation in your average rackable machine than there is on desktops & laptops, and (Open)Solaris already *is* a killer server OS.
The really disturbing thing, to me, is that many of the OS developers do seem to be spending a lot of time adding features which are useful only on desktops & laptops, presumably because they run OpenSolaris on their personal machines. All that effort is wasted, because to quite a good approximation they will be the only people who ever run it on their personal machines.