Renders of the Sony WF-1000XM4 have just been leaked by Roland Quandt and it not only revealed the design of the buds and the case, but also the colorways of the new TWS.
The XM4 has been redesigned and both the buds and the case look more compact than the XM3. Each XM4 bud is reported to be charged at 140mA, which is an upgrade from the 120mA on the XM3.
The successor is also said to retain wireless charging as well as the soft replaceable tips. According to FCC documents, they will also have active noise cancellation. The documents were also updated recently which could hint at a June announcement.