(there aren't any 7200rpm 2.5" 1TB drives at this time, only 5400rpm).
Incorrect.
The ssd used in the new iMacs isn't a standard over the counter disk style device...
http://www.frys.com/product/7325974?site=sr:SEARCH:MAIN_RSLT_PG
http://www.jr.com/hgst/pe/HIT_0S03563/#productTabDetails
http://www.microcenter.com/product/401314/Travelstar_1TB_7200RPM_25_Internal_Drive_Kit
I tested one in a LaCie Rugged Thunderbolt and it is about 20MB/s faster over the 5400RPM equivalent.
Someone needs to create a sticky called The Truth About Fusion.
The ssd used in the new iMacs isn't a standard over the counter disk style device that can be had at a discount almost everywhere. It's a "blade" style device like the one used in the Retnia MacBook Pro. It's going to be an easy swap to a larger one if the glass isn't glued on, but you just can't drop a generic ssd in there. Go to macsales.com and click on the SSD tab. Look at the ssd upgrade for the rMBP to see what I'm talking about.
When iFixit does their teardown, this will me more obvious.
Dale
One thing I'm wondering about is, if there would be extra wear on the 128GB SSD with the constant swapping in and out of large application and data segments.
2450 kr
Hint: same as the Mac mini price
MacBook Air notebooks are totally SSD, ranging from 128GB to 512GB.