However, the experience is still pretty effective considering this is a projector in a camcorder. The picture can be up to 60in diagonally, and the audio is also considerably louder than most camcorders are capable of. So you can enjoy the video you have shot in a darkened living room with considerable ease. If you're on holiday or just returned from an event, you can relive the moments immediately. This isn't something you would use every time you've shot video, and the resolution is only 640 x 360 so you're not experiencing your footage in all its HD glory. But this is definitely much more than just a gimmick.
Strangely, Sony has also taken a leaf out of the pocket Internet camcorder phenomenon and built a USB plug with a short cable into the PJ10 itself. This nestles inside the hand strap, out of the way, until required. In tandem with the USB plug, there's the usual software built in for uploading files directly to the Web. This supports Sony's Personal Space, YouTube (naturally), Dailymotion, Facebook for both photos and video, Flickr and Picasa, which is a pretty comprehensive selection except that it excludes Vimeo.
Like so many multi-function devices, one function tends to dominate Sony's HDR-PJ10. Not surprisingly, you will most likely use it as a camcorder many times more often than you will as a projector. It's also a bit expensive when decent HD camcorders like the Panasonic HDC-SD80 and the JVC Everio GZ-HM445 are now available for £300 or less. But at least it does a respectable job as a projector, so you will be able to make use of this feature when the opportunity arrises. Whilst it's definitely more dessert topping than floor cleaner, the PJ10 can perform its secondary function well enough for this to be worth having.