Submit an idea to a conference I was wondering if it is appropriate to submit a work to a conference call, which only presents an idea without further development.
So far, in my field, computer science, I usually submit works following more or less this structure:

introduction

background

methods

proof of concept

evaluation

conclusion


Recently, I have seen a call quite interesting for presenting an idea related to my previous research. For this reason, I have to admit that I know the topic. However, the idea is not implemented, neither I evaluated it. Let's say, the work is only the method.
This scenario makes me doubt about the appropriateness of presenting my idea in the shape of a paper.
Finally, if doing this is not appropriate for a conference. Can it be for a workshop? Or even more, a lighting talk, or a poster?
EDIT ---------------------------------------------------------------------
Apart from the interesting given answers, it is important to note that there are conferences (or tracks) for position papers:
A position paper presents an arguable opinion about an issue. The goal of a position paper is to convince the audience that your opinion is valid and worth listening to, without the need to present completed research work and/or validated results.
In CS, conferences are like journals in other fields: the normal medium to publish fresh results. But it is results. There might be exceptions for some specialized conferences that make exceptions.
Also, many CS conferences have a Workshop track in which unfinished work can be presented and discussed. Likewise, there is sometimes a Doctoral workshop in which PhD students discuss their ongoing research and get feedback.
But for a normal paper track in a typical conference, a completed work will be expected.