Sure, a good IDE will automatically create indentation when you type '{', so you need to only type a single character to start the block. We could actually say '{' is a shortcut key to start a block. IDE creates an indentation and draws a vertical line to enhance visual presentation of the block. Visually, braces are more or less just a noise, so removing them would improve "signal to noise ratio" and enhance reading experience.

However, logically braces are better at defining blocks of code than tabs. With braces we have start '{' and end '}' characters, but with tabs each line needs to be indented by a correct number of chars (tabs/spaces).

I am wondering, if we can have best of both worlds.

In some cases we are trying to draw visual indications with text. Wouldn't be better, if we let the IDE do the drawing? Eg.: two vs four spaces of indentation? It doesn't matter, if you can configure visual indentation depth on the fly in the IDE.