for the meanwhile the market trend is such that there are too many compromise for the any of these system,even if i have fair amount of $$ i couldn't get a really decent system in evil category

m4/3 keep rolling out stupid lens and and forgetting their smaller sensor format is already a compromise,they need some good lens with good focal length and aperture to let user upgrading from compact to appreciate the benefits of larger sensor,not to mentioned their crazy price for their accessories,panasonic will take every opportunity to stick the leica brand on their lens to make u pay more,beside that,no remote flash,no IR remote control even for their most expensive model,and their battery life is just simply pathetic(yea yea....because you wanna reduce the size so no large battery),in short,way too much compromise

sony nex system was the most screwed up system on earth i think,what for keep downsizing to such extend you can't even have proper flash and image stabilizer just to keep the body slim,where anything beyond the ultra wide pancake lens would make it unpocketable anyway,u'll even need a stupidly expensive flash adapter to make the flash stands higher to work with the longer zoom lens,and again their decision on the lens spec won't let users to appreciate the benefits of larger sensor anyway,but they do have IR remote at least

samsung still plague by bad sensors and while they looks ambitious,their product doesn't hide from the facts they don't have much experience in photography,but its the most balance system of all i think

for those who long for more depth of field control like me,i think xz-1 could offer around the same for much cheaper price,at least compare to current crop of lenses offer by these system at the meanwhile,for example a shot below with f/4 at 85mm (which could easily stop down even lower to f/2.2
http://www.flickr.com/photos/alexlotl/5644953706/