Projector ceiling

New construction:
 
I'm thinking a big conduit from the proj to the rack
 
The projector needs at minimum:
    Power and HDMI
    That's all I have going to my current projector. 
 
What else should I be considering?
 Should I prewire or just a pull string for 
 
CAT5
AV jacks
VGA
 
 
Maybe I'm overthinking this.   A big fat conduit should provide enough for the future.  I'd like to hear what others run to their projector.
 
--Russ

I would wire an outlet at the PJ, or use a power extender.

HDMI and cat6 x 2 (or x 3), outside of the conduit. The conduit is for future HDMI replacement.

The cat cable could be used for IR extension and/or a future HDMI extender. Leave the cat cable unterminated, hidden behind a plate, until you need it. Cat cable is cheap.

Yea, pull a pack of CAT6 cable makes sense.   Leave a conduit for the future pulls.

>10 years ago, before HDMI was in wide use.

1. Installed ceiling mount single gang electrical box for power.
2. Installed 2 inch electrical conduit for low voltage runs and low voltage box.
3. Built a swing down wooden box to hide the boxes, wires, and mount the projector. Also allows me to adjust the projector laterally based on lens location (L,R,C) on the projector to minimize keystone effects. One of these days I will get around to painting it.
4. 2xCat5 for component video extender. (My existing AVR did not have HDMI)
5. 1xCat5 for automatic screen control.
6. 1xCat5 for Ethernet (future proof)
7. Pulled some string for future pulls.

I had intermittent problems with the component to Cat5 extenders, which eventually failed, so I replaced 2xCat5 runs with high quality, 4K/3D, high speed, equalized, 30 foot HDMI cables from monoprice, and upgraded to an HDMI AVR.

I went this route to eliminate the complexity of HDMI to Cat5/6 extenders, which are not inexpensive, and wasn't sure if I would loose HDMI-CEC control using extenders.

I found if you wipe a little WD-40 on the HDMI cables at the lead end, the HDMI cable slides thru the conduit and past the other cables with ease.

Nice. I was looking for a projector but would like to know how much it costs you.

I bought an InFocus IN8606HD HD Home Theater Projector https://www.amazon.com/dp/B00FYZ22GQ/ref=cm_sw_r_cp_awd_gm7bxbX4R2FDN last year for $800 just as they were being discontinued. I have a 110 inch dia Dalite acoustically transparent motorized screen, which allows me to place front speakers behind the screen, just like a movie theater. If you are thinking of a new installation and don't know where to start:
1. Pick location of screen to minimize stray light sources.
2. Location of screen and projector distance will determine screen size, type, and surface material.
3. Now pick the projector type and lumens based on above.
4. Paint walls a darker flat color to minimize reflected light.
5. Make sure you have window covering to black out the room.
6. Invest in an AVR which has the capability to calibrate itself to the room. Speaker placement and calibration makes all the difference in the world.

Theater wall, screen up. All the AV gear is behind the curtain.


Screen down.

Conduit is a good idea.  I pushed conduit along my ceiling.    I have HDMI, Component, 2x Cat5, 1 trigger wire for the screen.   And an outlet in the ceiling.   Today I only use HDMI,1 cat5 for RS232, and the trigger.   I have had 3 projectors over the years, all Epsons and they tend to shift between RS232 and Ethernet for control so either way a cat 5 has you covered.     These days you will also find a WirelessHD option on most platforms for a little extra $$$, but I have never tried it.  It apparently is short range and/or line of site.
 
I got my HDMI from Monoprice.

yeah, i like your idea of ceiling projector. This gives a new look to home theaters. One thing more, origin acoustics provides best sound system for home theaters.