The time has come to say goodbye to 32-bit components and program files for SQL Server.
SQL Server 2016 CTP 2.4 reveals that x86 server components will be deprecated, although the X86 (32-bit) client components are still available. As majority of computers (even our own mobile phones) are on 64-bit computing and Microsoft consumer research reveals that x86 server instance components has no adoption in new deployments as X64 evolved as primary server installations.
So from SQL Server 2016 CTP 2.4 release onwards we will only be able to install client components related to x86 environments, not the server components.
Unless there is a huge outcry from the community there is a highest chance of discontinuing X86 server components within SQL Server 2016 RTM release.
Source: Technet blogs.