Yes, the trend is getting obvious. And Samsung has announced NX10 for about a year ago but postpone the launching schedule without reason. Samsung has already claimed APS-C is her way but she pause suddenly after EP-1 launched. I suspect Samsung wants to redesign the body to become smaller than the prototype.
Afterward, Sony has claimed her interested in this mirror less camera, then also comes the Pentax. Leica has rumor,too. She may make a lens-changeable X1 in the future. However, a lot of people may not know that Ricoh has been already doing something for an interchangeable lens camera without mirror. It may base on GR concept but with unknown sensor size. It is true, from a reliable source.
Samsung may guess right. 45% of DSLR will be mirrorless-interchangeable camera in the future. However, everything relies on the AF system since there are tons of technical problems to break through. 4/3 has a smaller sensor size makes the CDAF easier but it may not happen to APS-C sensor. It seems that Sony may take the advantage from Live View AF technology. She already shows her power on A350 and the after.
But Fuji, I am really anxious of her situation. SuperCCD EXR in fact is not as good as some of the competitor such as G11, LX3, GRD III with 1/1.7" sensor size. Detail loss seriously in high ISO from the sample. What Fuji can do is making a bigger sensor at least as same as micro 4/3 to regain the detail. Otherwise, I can't believe it can survive long enough between the competitors. However, the only thing I really long for is the EBC lens es coming back.