the 90mm macro seems interesting. If they could price it somewhere around $500-$600 then I'd be interested. I'm just about confident that they'll try to price it closer to the Canon 100L IS though which is funny to me that they seem to price their macros so close to Canon's which at that point it doesn't make any sense to go away from something you know will work to something you're taking more risk on.
Not really, it looks like the macro will be (much) more expensive which is rather disappointing. These are prices from two dutch webshops:
Tamron 90mm F2.8 AF Di VC USD Macro:
999 Euro (this must be the recommended retail price as it is not yet available).
Canon EF 100mm F/2.8 L USM iS:
717 Euro after cashback (cashback is 70 Euro)
5D3, 5D2, G5X, G16 | SY14/2.8, V20/3.5, 28/2.8 IS, Ʃ35/1.4, 50/1.8, 50/1.8 STM, Ʃ50/1.4 EX, 100/2.8L IS Macro, 16-35/4L IS, 24-105/4L IS, 70-200/2.8L IS II, 1.4x II, 2.0x III, T28-300 VC PZD, 70-300L IS, Ʃ150-600 OS HSM S