Selecting the WirelessHD Home Cinema 3010e over the standard 3010 projector means that one way or another, you have use for the WirelessHD feature. Certainly, if you are portable, it comes in very handy. Or, if you are permanently mounting it in your room, you won't need to run an HDMI wire to your sources. If you don't need the WirelessHD feature - now or the future.
Most folks will opt for the standard HC3010. It's simple, if you don't need the WirelessHD, why spend for it? Still, it's attractive to have. Even if you have wired for everything you need, having the WirelessHD transmitter handy allows you to add one more HDMI source, such as, perhaps, a friend's MacBook, or what ever shows up at the door.