#1. The 1705 Alreasdy has a BIOS update to support the new processor
#2. While gaming performance increases may be minimal initially (need a few BIOS updates) for gamers, the A/V and business perfomance would be greatly increased.
I use my 1710 for gaming as well as for business so the update would be benificial to me, howvever considering the processor I already have it does not make much sense for me to upgrade at this point.
...And considering the M90 is essentially the same exact laptop as the M1710 (minus the bling & a slightly different video card directed more towards CAD) that statement holds very little water.