How the hardware sale of First 4 months of 2008 has changed your estimates.

[TheSource]

Just doing year over year for January-April 2007 vs. January-April 2008 * 2007 sales shows this for 2008:

 

World	2007 Tot	YoY Trend	Projection
DS	29,075,131	0.9796153	28,482,444
Wii	16,290,983	1.4946666	24,349,589
PSP	11,172,003	1.5314464	17,109,324
PS3	7,556,733	1.6734366	12,645,714
Xbox 360	8,107,580	1.4277102	11,575,274
PS2	9,119,248	0.9804251	8,940,740
Americas	2007 Tot	YoY Trend	Projection
DS	9,929,469	1.1666911	11,584,623
Wii	7,390,511	1.465206	10,828,621
PSP	4,034,597	1.4778964	5,962,716
PS3	2,777,745	1.9253683	5,348,182
Xbox 360	5,291,687	1.2638966	6,688,145
PS2	4,227,926	0.9680111	4,092,679
Others	2007 Tot	YoY Trend	Projection
DS	11,834,044	1.3624382	16,123,154
Wii	5,219,233	2.2691877	11,843,419
PSP	4,029,390	1.3030968	5,250,685
PS3	3,560,376	1.851331	6,591,435
Xbox 360	2,557,969	1.7982771	4,599,937
PS2	4,081,170	1.1070911	4,518,227
Japan	2007 Tot	YoY Trend	Projection
DS	7,311,618	0.4880317	3,568,301
Wii	3,681,239	0.9597138	3,532,936
PSP	3,108,016	1.8330192	5,697,053
PS3	1,218,612	0.9208985	1,122,218
Xbox 360	257,924	0.6284772	162,099
PS2	810,152	0.6382504	517,080

 

So without any considerations of games, price cuts, etc, YoY would give you this (Americas, Others, Japan):

	2008 Proj	2008 Proj	2008 Proj
DS	11,584,623	16,123,154	3,568,301
Wii	10,828,621	11,843,419	3,532,936
PSP	5,962,716	5,250,685	5,697,053
PS3	5,348,182	6,591,435	1,122,218
Xbox 360	6,688,145	4,599,937	162,099
PS2	4,092,679	4,518,227	517,080

But when I apply factors like games, when there were price cuts last year, etc, and scale the raw projection results accordingly I get this:

 

	2008 FP	2008 FP	2008 FP
DS	9,846,929	12,898,523	3,835,924
Wii	11,911,483	11,843,419	4,062,876
PSP	5,962,716	4,988,151	5,697,053
PS3	4,011,137	5,602,719	953,885
Xbox 360	5,350,516	3,104,958	121,575
PS2	2,762,558	2,643,163	517,080