All my lenses just doubled in length ....

Do you have a workflow? I don't.

I can shoot in RAW, and use sharpening techniques, but they are more comparable to Digital Zoom than to Clear Image Zoom.

I would need special PP software to enable the same - and I don't find it in my LR or DxO software - and I would have to shoot in RAW (full image), crop and process in post.

I find it much easier to shoot in JPG, and have it al done in the camera (upsampling, re-imaging).

Would I use it often? Likely not. But there are cases where this just might be the most convenient way (e.g. walk-around with the 1650, going to 100mm, or at the race-track with the 18200, going to 400mm).

Read this post:

http://forums.dpreview.com/forums/post/42389203

Sony marketing fodder:

http://www.cyberscholar.com/?company_site/index/Sony/training_library/module/38777/5/469.cfm

http://www.sony-asia.com/microsite/assets/cyber-shot/2011h2/clear-image-zoom/

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Cheers,
Henry