I found an interesting story on Home Theater Review, Do Home Theaters Actually Help Sell Homes In Today's Real Estate Market?, investigating whether or not a home that has a theater, distributed audio and other custom integrated designs does better in the "for sale" housing market. It's a question that should certainly be considered when deciding whether to make such an expenditure.
The short of it seems to be that, yes, having modern technology in the home helps sell it. In large homes it's almost expected. In moderately priced homes it can differentiate itself from other homes that lack the gadgets. Young home buyers are drawn to the technology more so than the elderly which makes sense.
The problem is most appraisers see right past such amenities and don't take it into account when calculating their appraisal. And don't get me started on home appraisals. How is it, two months ago, when I tried to refinance my home the appraisal came in low. Low enough for the bank to reject my refinancing application even though I'm not even close to underwater. Yet, the county appraised the same home nearly $20,000 higher. I know the realistic answer. It's all about money and who wants it.
But I digress. The bottom line would seem to be, go for it. Create the technological wonders of your dreams. It may not be totally recuperated but it won't hurt the bottom line.