Here is a concept - Infiniti could make a vehicle that could slide into a BMW 7 series segment:

Here is a concept - Infiniti could make a midengine sports car that could match up against the likes of an Audi R8 or a BMW i8:

Here is a concept - Infiniti could make a version of the Q50 that competes against an E-Class AMG or BMW M5:

Here is a concept - Infiniti conceptualizes a potential G-coupe successor in the form of a flagship sports car concept:

Here is a concept - Infiniti could actually produce a successor to the G coupe, shown here in the form of another concept vehicle:

Well, Infiniti - I have a concept for you: Produce a real f*** car.
Commit to SOMETHING. Produce SOMETHING. Identify yourself as SOMETHING. Live and breathe for SOMETHING.
We have a luxury arm of a massively powerful car company that is so inept when it comes to decision making that it has become a glorified auto show troll.

Pictured: Infiniti's Marketing Teaser for the 2016 LA Auto Show
The current G60 coupe (see what I did there?) has been sold since MY2009 with few, if any, significant updates.
The current G sedan, which was replaced but not really by the Q50, has been sold for over NINE MODEL YEARS now.
The Q50, which doesn't replace the G sedan, uses the same engine that has been used in the G since 2009 when not in hybrid guise.
The current M sedan has been sold since 2009.
The current FX crossover has been sold since 2008.
The current QX56 has been a thing since 2010 (which is a redesign of a body using an 11 year old platform - hardly clean sheet).
Meanwhile, Mercedes has debuted several clean-sheet vehicles including the GLA and CLA class vehicles as well as redesigns of nearly every model in the fleet, including the S class and C class. BMW has revamped its entire lineup save the X5 and one or two others. All new powertrains and platforms for each. Audi has more conservatively refreshed its lineup as well. Lexus has even aggressively restyled its entire lineup in the past two years.
In the time since Infiniti conceptualized its flagship vehicle (twice, maybe three times if you think about it with the Q80 being billed in the same way the Essence and the Emerg-E were), its entire competition has lineups that have evolved - some experiencing two cycles of evolution.
Infiniti as a company is completely inept - a brand that is in an identity crisis, and upper management that is stifling the few minds left at the company and preventing anyone from pulling the trigger on something.
You can only conceptualize your purpose and direction for so long until you become just that - a concept.
Perhaps this is all part of the plan, or perhaps Nissan is at home, asleep and dreaming of a radical new concept: a luxury arm that can compete with the best of the world.

