Dell all but confirmed this a little while ago but now it's official (and nearly available). The 11-inch M11x is getting an upgrade that will see the 'little engine that can' move from an Intel Core 2 Duo to Core i5 or i7. Along with the move from Core 2 Duo to the Core i-series, the M11x is being given the Nvidia Optimus treatment too.
Of course, the added power and graphics switching technology doesn't come free. If you want the old Core 2 Duo version you can expect the same $799 starting price. However, if you're looking to get your hands on an Optimus model with Core i5 or i7, expect a base price of $949 or $1099 respectively.
New models ship July 2.