The Broadwell-U parts that will follow in Q1 2015 will have a TDP in the 15W to 28W range and the higher-performance Broadwell-H with 47W TDP should arrive in Q2 2015. At present it's unknown if we'll see Broadwell-M chips with such high TDPs.
Broadwell 14nm, also known as the 5th generation Core, will come in a range of Core i7, Core i5 and Core i3 products. This is not all as there will be Pentium and Celeron based Broadwell processors. This might bring some confusion as Celeron and Pentium products are going to get the Braswell core and the same Celeron and Pentium branding. Obviously Intel will use different numbers to differentiate these products, knowing that most of its consumers don't understand the difference and that a bigger number denotes a better chip.
Broadwell-Y, currently branded as Core 5Y70, will be the only 14nm processor line to launch in Q4 2014, followed by two lower spec SKUs based on the same Broadwell-Y core.
Most Broadwell products with a higher TDP, including Broadwell-U processors that range between 15W and 28W, will launch in Q1 2015. This is the bulk of Intel’s mobile processors, as most of them will feature a TDP of 15W to 28W.