Owning a Leica is a double-edged sword. I'm never paid much attention due to the camera and often thought of as just another tourist, albeit where I live; however, this exposes the problem: Leica has lost much market share and, here, has little market presence, and even though they charge a premium their sales numbers are relatively low giving them little revenue and slim profit from the camera division.
Now, before you all do the splits, all I mean to suggest is that Leica is still dedicated to the consumer camera market and pours some funds into R&D but at a rate which could be higher with greater market capitalization. Keeping this is mind R&D will cease before camera production. Luckily, though, seeing as Leica users care not for technological advancement but for excellence, if R&D were to stop then the, at the time, present plethora of superb camera and optical equipment would last users some time yet before camera production winds up.
As long as the production and sale of cameras and lenses is profitable it ought to survive. This division is also backed by a strong presence elsewhere which is excellent news as expressed by sales figures. Leica have insured themselves from insolvency by noticing a shift and capitalizing where they could, when they could and with whom they could - i.e. forget going at it with the Japanese giants but look for a market untapped with room for expansion - all whilst not dropping the camera division.
Really, we have nothing about which to worry. Only when cameras stop turning a profit shall we have reason for fear. This is highly unlikely given the large margins able to be charged in luxury goods as customers are often loyal, wealthy and dedicated.
