Intel is currently preparing Santa Rosa and by 2008 we can expect the follow-up, codenamed Montevina.
Montevina will support 'Penryn', Intel's 45nm die-shrink of its current generation of 65nm Core 2 processors. The chip giant has said Penryn will debut in late 2007 and mark the company's shift to 45nm. A year later, Intel will introduce 'Nehalem', its 45nm-specific next major architecture revision.
Just as Santa Rosa hasn't followed hot on the heels of 'Merom', the Core 2 Duo mobile processor, so it seems likely Montevina will debut some months after Penryn. The 45nm chip is said to consume no more than 29W, compared to Merom's 35W TDP.
Penryn will also see the debut of SSE 4, 50 new instructions that will sit alongside the x86 ISA.