Update README.md

README.md

@@ -3,9 +3,12 @@
 ![CI](https://github.com/ChrisRega/lazy_async_promise/actions/workflows/rust.yml/badge.svg?branch=main "CI")
 
 This crate currently only features two simple primitives for getting computation time off the main thread using tokio:
-- LazyVecPromise for a vector-backed storage which can be partially displayed
-- LazyValuePromise for a single value future
+- `LazyVecPromise` for a vector-backed storage which can be displayed while the task in progress.
+- `LazyValuePromise` for a single value future that can be updated during task-progress. My usage was for iterative algorithms where the intermediate results were interesting for display.
 
-As the name suggests both of them are lazily evaluated and nothing happens until polled for the first time.
+As the name suggests both of them are lazily evaluated and nothing happens until they are polled for the first time.
+
+For single values which are either available or not there's `ImmediateValuePromise` which triggers computation immediately.
+There's not in-calculation value read out, so either it's finished or not. 
 
 Example-usage of this crate with a small egui/eframe blog-reader can be found [here](https://github.com/ChrisRega/example-blog-client/)