I'm planning a trip to Tokyo in May and wanted to have a professional camera to take with me that would be lightweight and portable and yet have all (or almost all) the functions and quality of a DSLR. After checking reviews and specs on the web, the camera I finally decided on was the Panasonic Lumix DMC-GH2. The lack of a mirror and the "four thirds" sensor enable a design that resembles an extremely compact DSLR and is not much larger, or heavier, than a point and shoot.
The other factors that in my decision were the 16.0+ megapixel sensor, the ISO sensitivity (up to 12,800), the extremely bright electronic viewfinder, and an interchangeable 14 - 140 (equivalent to a 28 - 280) zoom lens.
Apparently, I'm not the only one who was impressed by this camera's specs. At B&H, the camera -- with the above mentioned lens -- was only available by mail order and went in and out of stock in one day (based on the elapsed time from B&H's email advising that it was available to the following day when the website description again changed to "Temporarily Out of Stock.") I actually picked up the camera in store at Adorama but, at the time, there were only three in stock. The price at both stores was the same -- approximately $1,500.
I hope soon to post photos taken with the GH2 and to report more fully on its capabilities.