I'm comparing these two Apple laptops:

MacBook Pro (13", 2011 model):

• 2.8GHz dual-core Intel Core i7 processor with 4MB shared L3 cache
• 4GB (two 2GB SO-DIMMs) of 1333MHz DDR3 SDRAM
• AMD Radeon HD 6770M graphics processor with 1GB of GDDR5 memory on 2.4GHz configuration

MacBook Air (13", 2011 model):

• 1.7GHz dual-core Intel Core i5 with 3MB shared L3 cache
• 4GB of 1333MHz DDR3 onboard memory
• Intel HD Graphics 3000 processor with 384MB of DDR3 SDRAM shared with main memory

There's definitely a gap between them in terms of CPU speed and graphics, but what practical difference would this make on a day-to-day basis?

On the one hand, I love the sleek, thin appearance of the Air.

On the other hand, I don't want a machine that's going to be dog-slow when doing tasks such as running Virtual Machines, dual-booting to Windows and running multiple instances of Visual Studio, and maybe some light gaming.

Is there going to be a major difference that makes the MacBook Pro a more attractive purchase?