I went through all the RFCs and Tracking Issues, here are the ones I'm most excited about

Still RFCs that have not yet been accepted:

• Macro fragment fields https://github.com/rust-lang/rfcs/pull/3714
• #[diagnostic::blocking] https://github.com/rust-lang/rfcs/pull/3639
• Named macro capture groups https://github.com/rust-lang/rfcs/pull/3649
• #[cfg_alias] https://github.com/rust-lang/rfcs/pull/3804
• Tuple unpacking https://github.com/rust-lang/rfcs/pull/3723
• Generic integers https://github.com/rust-lang/rfcs/pull/3686
• #[derive(Default)] on enum variants with fields https://github.com/rust-lang/rfcs/pull/3683
• postfix .match https://github.com/rust-lang/rust/issues/121618
• postfix .macros!() https://github.com/rust-lang/rfcs/pull/2442

Has tracking issues:

• become (explicit tail calls) https://github.com/rust-lang/rust/issues/112788
• cargo script https://github.com/rust-lang/cargo/issues/12207
• core::mem::variant_count https://github.com/rust-lang/rust/issues/73662
• Deref patterns https://github.com/rust-lang/rust/issues/87121
• cfg_select! https://github.com/rust-lang/rust/issues/115585
• Custom inner attributes https://github.com/rust-lang/rust/issues/54726
• Iterator::intersperse https://github.com/rust-lang/rust/issues/79524
• Declarative macros 2.0 https://github.com/rust-lang/rust/issues/39412
• Default field values https://github.com/rust-lang/rust/issues/132162
• Delegation https://github.com/rust-lang/rust/issues/118212
• Guard patterns https://github.com/rust-lang/rust/issues/129967
• gen blocks and functions https://github.com/rust-lang/rust/issues/117078
• if let guard https://github.com/rust-lang/rust/issues/51114
• TAIT https://github.com/rust-lang/rust/issues/63063
• ! https://github.com/rust-lang/rust/issues/35121
• std::range - New range type https://github.com/rust-lang/rust/issues/123741#issue-2236353974
• Trait alias https://doc.rust-lang.org/beta/unstable-book/language-features/trait-alias.html
• try blocks https://github.com/rust-lang/rust/issues/31436
• Macro meta-variable expressions https://github.com/rust-lang/rust/issues/83527 https://github.com/rust-lang/rust/issues/124225
• macro_rules! derive macros https://github.com/rust-lang/rust/issues/143549
• macro_rules! attribute macros https://github.com/rust-lang/rust/issues/143547
• Step trait for a..b syntax overloading https://github.com/rust-lang/rust/issues/42168
• hash_map! macro https://github.com/rust-lang/rust/issues/144032

I would love if we got any 1 of those before chrismas, (maybe the if let guard :D)