69.iNCH.tv The Vutec EVPV3460 portable pull-up front projection screen with viewable screen area measuring 34" high x 60" wide is double listed at Amazon.com as 70" and 68" diagonal. However, using the Pythagorean theorem, 34² + 60² = C² where C is diagonal screen size, you get 68.96 iNCHES, which rounds to 69 iNCH.

Anyway, you could purchase this screen and pair it up with the new Epson PowerLite Home Cinema 3010e 3D-ready 1080p home theater projector with built-in 10-watt stereo speakers and which includes 2 pairs of 3D glasses.

Of course, to experience three dimensions, you'll also need to separately supply and connect one or more 3D-capable A/V sources such as a 3D Blu-ray Disc player, Sony PlayStation 3, and/or 3D capable HD tuner/DVR with HDMI cable(s). You may also want to consider a portable stand.