With the launch of the TL2 and the CL this year, Leica has boldly put its weight behind its APSC systems. The cameras look and feel great, though they would undoubtedly benefit from a richer selection of fast lenses to partner with.
Personally, I see the TL / CL cameras filling an important void for M shooters. With rangefinders, lengths between 24-50mm tend to hit the sweet spot, and while the fast telephoto lenses render beautifully, manual focusing a 90mm Summicron on a rangefinder for candid street or action is borderline masochistic. In this respect, it would be great to see TL Summicron or Summarit prime equivalents of either the 75, 90, or 135 focal lengths, all with fast auto focus. I know we have the 55mm - 135mm zoom, but F 4.5 is not workable in low light, and the 60mm F2.8 Macro, while gorgeous, is a little too slow to auto focus.
I would love to know what other people want to see on the TL lens roadmap. Let us build a little public pressure to ensure that these smart systems get the lenses they deserve.