I think people are tired of retro style graphics, not specifically pixelart. Pixelart is the medium not the style per say.
For example Eitr, Tower57, Mother Russia Bleeds, Megasphere and others have gained a lot of traction and good press/attention (some even got big stage presence on E3), and most if not all of those games have are made with pixelart though they utilize very modern techniques like dynamic lighting and shaders.
When people say they are tired of pixelart they mean this or this but they rare critique this or this.
The former utilize a tired style (Realm of the Mad God, Sword and Sworcery), this style has been utilized an incredible lot outside of their original sources and I can understand why some people are tired of them. The latter though have gained almost no negative attention because their artstyle is unique and fresh (or brings life to an old but not often justified style like Tower57). Not to toot my own horn but I am yet to gain a single negative remark about the visuals in Razzia and that game has been around since January on various forums and social media. I wouldn't be too worried about using pixelart unless you use a tired style.
I think my point with all of that is that there's nothing wrong with pixelart because it's simply the medium that you use, most people are tired of specific styles, not the means of which you produce that style. And it also helps to understand your target audience, it's futile to market low-grade graphics to an audience that expect better but that doesn't mean that low-grade pixelart visuals is a small niché, in fact the market for that kind of visuals is quite large, if you know where to look.