I would imagine lenses will still be available for HT's but it will become even more of a niche market, appealing to a small but dedicated enthusiast base. And you know what happens to prices in niche markets. ^
They still press a few vinyl albums for selected artists that appeal to the niche audiophile market, but prices for those records are 6 or 7 times higher than they were in vinyl's heyday. Of course, they're much higher quality too - the market demanded it. I suspect the same thing will happen with lenses.