ceiling mount that puppy and get yourself a long cable instead.
As I am occasionally a projector gamer, I second this consideration; ceiling mounting the projector is definitely better if you plan on having movie-viewing parties and/or moving the controls pedestal aside for some DDR pads. Also, if you put it inside the control pedestal, your controls may become uncomfortably warm after a while, as most projectors create considerable amounts of heat (although, that could be a convenient way to quiet projector fan noise.)
All of that aside, I think this unit is not designed to have the projector in the pedestal, because the spec list includes a wireless A/V sender. (no need for a very long cable)
Forget arcade authentic, why would you want to blow up a 320x240 game that large? It will just look crappy.
Surprisingly, 320x240 games do not look as crappy when natively projected or properly scaled on a good-quality high-res DLP as they do on, say, a 320x240 toy store LCD projector. Vector games look great, but they might look even better on a lasermame projector system. If you don't need the CRT-induced artifacts, DLP projectors make arcade games look beautiful. However, I do feel awkward playing some of the low-color 2D games on a projector now that the "wow factor" of a big screen is gone. Also, on single-chip DLP, the older B&W and black-and-bright games are really annoying to play if you are prone to "the rainbow effect" of DLP.
Here's what bother's me about this product's features list:
-"light gun"
AFAIK light guns do not work with projectors. I have tried. There are newer camera based guns and such that work, and projectors work with them (Duck Hunt is great at 8-feet wide), but if they are including a traditional light gun it may not work with the projector.
-Price
Initially the price bothers me, so I'll give a rough guess at the mostly current cost of some of the parts plus shipping:
2000 lumen XGA DLP projector- got one earlier this year for ≈ $650
AMD 3200 with speakers Windows and enough parts to easily install game CD's (ebay) $300
Happ joysticks and buttons (ebay)≈$40-$60
Lighted 3.25" trackball (75) + mount plate (15) + light (<2)≈$82
Gun control that actually works with a projector ≈$50
100-inch dalite screen with tripod $150
XGA compatible video sender ≈$650
All those officially licensed game packs at $8-$40 each≈ $200
keyboard encoder + wiring ≈ $50
Hardware, lumber and finishing.

lets give them $500 worth of quality (doubt-it)
let's see...that's $2692 Am I missing overshooting anything as far as parts/cost go?
About half (YMMV) of the final price (if you own tools) to build a comparable project "from scratch" yourself.

scratch-yourself joke to commence in 5....4.....3......