Unless you build from scratch, and white box stores suddenly start selling a 48v version of every standard household appliance (with industrial supply chain to support that market), inverters are not going anywhere.
The only place it makes sense is personal tech and computing, where USB chargers are cheap and ubiquitous, with technology replacement in 2-5 years instead of 5-10 for standard appliances.
The only place it makes sense is personal tech and computing, where USB chargers are cheap and ubiquitous, with technology replacement in 2-5 years instead of 5-10 for standard appliances.